diff --git a/build_lxc.sh b/build_lxc.sh
index e8612e6..674742c 100755
--- a/build_lxc.sh
+++ b/build_lxc.sh
@@ -1,5 +1,15 @@
 #!/usr/bin/env bash
 
+# Use stackrc.example if stackrc is missing
+if [ ! -e ./stackrc ]; then
+    read -n1 -p "No stackrc present.  Copy stackrc.example to stackrc? (y/n) "
+    echo
+    [[ $REPLY = [yY] ]] && cp stackrc.example stackrc|| { echo "Aborting:  Missing stackrc"; exit 1; }
+fi
+
+# Source params
+source ./stackrc
+
 # Configurable params
 BRIDGE=${BRIDGE:-br0}
 CONTAINER=${CONTAINER:-STACK}
@@ -13,6 +23,9 @@ COPYENV=${COPYENV:-1}
 # Param string to pass to stack.sh.  Like "EC2_DMZ_HOST=192.168.1.1 MYSQL_USER=nova"
 STACKSH_PARAMS=${STACKSH_PARAMS:-}
 
+# Option to use the version of devstack on which we are currently working
+USE_CURRENT_DEVSTACK=${USE_CURRENT_DEVSTACK:-1}
+
 # Warn users who aren't on natty
 if ! grep -q natty /etc/lsb-release; then
     echo "WARNING: this script has only been tested on natty"
@@ -51,6 +64,19 @@ if [ -d /cgroup/$CONTAINER ]; then
     cgdelete -r cpu,net_cls:$CONTAINER
 fi
 
+# git clone only if directory doesn't exist already.  Since ``DEST`` might not
+# be owned by the installation user, we create the directory and change the
+# ownership to the proper user.
+function git_clone {
+    if [ ! -d $2 ]; then
+        sudo mkdir $2
+        sudo chown `whoami` $2
+        git clone $1 $2
+        cd $2
+        # This checkout syntax works for both branches and tags
+        git checkout $3
+    fi
+}
 
 # Warm the base image on first install
 CACHEDIR=/var/cache/lxc/natty/rootfs-amd64
@@ -63,15 +89,23 @@ if [ ! -d $CACHEDIR ]; then
     chroot $CACHEDIR apt-get update
     chroot $CACHEDIR apt-get install -y --force-yes `cat files/apts/* | cut -d\# -f1 | egrep -v "(rabbitmq|libvirt-bin|mysql-server)"`
     chroot $CACHEDIR pip install `cat files/pips/*`
-    # FIXME (anthony) - provide ability to vary source locations
-    #git clone https://github.com/cloudbuilders/nova.git $CACHEDIR/opt/nova
-    bzr clone lp:~hudson-openstack/nova/milestone-proposed/ $CACHEDIR/opt/nova
-    git clone https://github.com/cloudbuilders/openstackx.git $CACHEDIR/opt/openstackx
-    git clone https://github.com/cloudbuilders/noVNC.git $CACHEDIR/opt/noVNC
-    git clone https://github.com/cloudbuilders/openstack-dashboard.git $CACHEDIR/opt/dash
-    git clone https://github.com/cloudbuilders/python-novaclient.git $CACHEDIR/opt/python-novaclient
-    git clone https://github.com/cloudbuilders/keystone.git $CACHEDIR/opt/keystone
-    git clone https://github.com/cloudbuilders/glance.git $CACHEDIR/opt/glance
+fi
+
+# Cache openstack code
+git_clone $NOVA_REPO $CACHEDIR/opt/nova $NOVA_BRANCH
+git_clone $GLANCE_REPO $CACHEDIR/opt/glance $GLANCE_BRANCH
+git_clone $KEYSTONE_REPO $CACHEDIR/opt/keystone $KEYSTONE_BRANCH
+git_clone $NOVNC_REPO $CACHEDIR/opt/novnc $NOVNC_BRANCH
+git_clone $DASH_REPO $CACHEDIR/opt/dash $DASH_BRANCH $DASH_TAG
+git_clone $NIXON_REPO $CACHEDIR/opt/nixon $NIXON_BRANCH
+git_clone $NOVACLIENT_REPO $CACHEDIR/opt/python-novaclient $NOVACLIENT_BRANCH
+git_clone $OPENSTACKX_REPO $CACHEDIR/opt/openstackx $OPENSTACKX_BRANCH
+git_clone $MUNIN_REPO $CACHEDIR/opt/openstack-munin $MUNIN_BRANCH
+
+# Use this version of devstack?
+if [ "$USE_CURRENT_DEVSTACK" = "1" ]; then
+    rm -rf $CACHEDIR/opt/devstack
+    cp -pr . $CACHEDIR/opt/devstack
 fi
 
 # Destroy the old container
diff --git a/build_nfs.sh b/build_nfs.sh
index 59a3609..c0fa733 100755
--- a/build_nfs.sh
+++ b/build_nfs.sh
@@ -1,5 +1,15 @@
 #!/bin/bash
 
+# Use stackrc.example if stackrc is missing
+if [ ! -e ./stackrc ]; then
+    read -n1 -p "No stackrc present.  Copy stackrc.example to stackrc? (y/n) "
+    echo
+    [[ $REPLY = [yY] ]] && cp stackrc.example stackrc|| { echo "Aborting:  Missing stackrc"; exit 1; }
+fi
+
+# Source params
+source ./stackrc
+
 # TODO: make dest not hardcoded
 
 NAME=$1
@@ -15,13 +25,15 @@ if [ ! -d proto ]; then
     chroot proto apt-get update
     chroot proto apt-get install -y `cat files/apts/* | cut -d\# -f1 | egrep -v "(rabbitmq|libvirt-bin|mysql-server)"`
     chroot proto pip install `cat files/pips/*`
-    git clone https://github.com/cloudbuilders/nova.git proto/opt/nova
-    git clone https://github.com/cloudbuilders/openstackx.git proto/opt/openstackx
-    git clone https://github.com/cloudbuilders/noVNC.git proto/opt/noVNC
-    git clone https://github.com/cloudbuilders/openstack-dashboard.git proto/opt/dash
-    git clone https://github.com/cloudbuilders/python-novaclient.git proto/opt/python-novaclient
-    git clone https://github.com/cloudbuilders/keystone.git proto/opt/keystone
-    git clone https://github.com/cloudbuilders/glance.git proto/opt/glance
+    git_clone $NOVA_REPO proto/opt/nova $NOVA_BRANCH
+    git_clone $GLANCE_REPO proto/opt/glance $GLANCE_BRANCH
+    git_clone $KEYSTONE_REPO proto/opt/keystone $KEYSTONE_BRANCH
+    git_clone $NOVNC_REPO proto/opt/novnc $NOVNC_BRANCH
+    git_clone $DASH_REPO proto/opt/dash $DASH_BRANCH $DASH_TAG
+    git_clone $NIXON_REPO proto/opt/nixon $NIXON_BRANCH
+    git_clone $NOVACLIENT_REPO proto/opt/python-novaclient $NOVACLIENT_BRANCH
+    git_clone $OPENSTACKX_REPO proto/opt/openstackx $OPENSTACKX_BRANCH
+    git_clone $MUNIN_REPO proto/opt/openstack-munin $MUNIN_BRANCH
     chroot proto mkdir -p /opt/files
     wget -c http://images.ansolabs.com/tty.tgz -O proto/opt/files/tty.tgz
 fi
diff --git a/stack.sh b/stack.sh
index 15698bd..13ea38c 100755
--- a/stack.sh
+++ b/stack.sh
@@ -59,6 +59,16 @@ set -o errexit
 # an error.  It is also useful for following allowing as the install occurs.
 set -o xtrace
 
+# Use stackrc.example if stackrc is missing
+if [ ! -e ./stackrc ]; then
+    read -n1 -p "No stackrc present.  Copy stackrc.example to stackrc? (y/n) "
+    echo
+    [[ $REPLY = [yY] ]] && cp stackrc.example stackrc|| { echo "Aborting:  Missing stackrc"; exit 1; }
+fi
+
+# Import variables
+source ./stackrc
+
 # Destination path for installation ``DEST``
 DEST=${DEST:-/opt}
 
@@ -69,7 +79,7 @@ NIXON_DIR=$DEST/dash/openstack-dashboard/dashboard/nixon
 GLANCE_DIR=$DEST/glance
 KEYSTONE_DIR=$DEST/keystone
 NOVACLIENT_DIR=$DEST/python-novaclient
-API_DIR=$DEST/openstackx
+OPENSTACKX_DIR=$DEST/openstackx
 NOVNC_DIR=$DEST/noVNC
 MUNIN_DIR=$DEST/openstack-munin
 
@@ -141,34 +151,31 @@ function git_clone {
         sudo mkdir $2
         sudo chown `whoami` $2
         git clone $1 $2
+        cd $2
+        # This checkout syntax works for both branches and tags
+        git checkout $3
     fi
 }
 
 # compute service
-# FIXME - need to factor out these repositories
-# git_clone https://github.com/cloudbuilders/nova.git $NOVA_DIR
-if [ ! -d $NOVA_DIR ]; then
-    bzr clone lp:~hudson-openstack/nova/milestone-proposed/ $NOVA_DIR
-fi
+git_clone $NOVA_REPO $NOVA_DIR $NOVA_BRANCH
 # image catalog service
-git_clone https://github.com/cloudbuilders/glance.git $GLANCE_DIR
+git_clone $GLANCE_REPO $GLANCE_DIR $GLANCE_BRANCH
 # unified auth system (manages accounts/tokens)
-git_clone https://github.com/cloudbuilders/keystone.git $KEYSTONE_DIR
+git_clone $KEYSTONE_REPO $KEYSTONE_DIR $KEYSTONE_BRANCH
 # a websockets/html5 or flash powered VNC console for vm instances
-git_clone https://github.com/cloudbuilders/noVNC.git $NOVNC_DIR
+git_clone $NOVNC_REPO $NOVNC_DIR $NOVNC_BRANCH
 # django powered web control panel for openstack
-git_clone https://github.com/cloudbuilders/openstack-dashboard.git $DASH_DIR
-# FIXME - need to factor out logic like this
-cd $DASH_DIR && sudo git fetch && sudo git checkout origin/keystone_diablo
+git_clone $DASH_REPO $DASH_DIR $DASH_BRANCH $DASH_TAG
 # add nixon, will use this to show munin graphs in dashboard
-git_clone https://github.com/cloudbuilders/nixon.git $NIXON_DIR
+git_clone $NIXON_REPO $NIXON_DIR $NIXON_BRANCH
 # python client library to nova that dashboard (and others) use
-git_clone https://github.com/cloudbuilders/python-novaclient.git $NOVACLIENT_DIR
+git_clone $NOVACLIENT_REPO $NOVACLIENT_DIR $NOVACLIENT_BRANCH
 # openstackx is a collection of extensions to openstack.compute & nova
 # that is *deprecated*.  The code is being moved into python-novaclient & nova.
-git_clone https://github.com/cloudbuilders/openstackx.git $API_DIR
+git_clone $OPENSTACKX_REPO $OPENSTACKX_DIR $OPENSTACKX_BRANCH
 # openstack-munin is a collection of munin plugins for monitoring the stack
-git_clone https://github.com/cloudbuilders/openstack-munin.git $MUNIN_DIR
+git_clone $MUNIN_REPO $MUNIN_DIR $MUNIN_BRANCH
 
 # Initialization
 # ==============
@@ -180,7 +187,7 @@ cd $NOVA_DIR; sudo python setup.py develop
 cd $NOVACLIENT_DIR; sudo python setup.py develop
 cd $KEYSTONE_DIR; sudo python setup.py develop
 cd $GLANCE_DIR; sudo python setup.py develop
-cd $API_DIR; sudo python setup.py develop
+cd $OPENSTACKX_DIR; sudo python setup.py develop
 cd $DASH_DIR/django-openstack; sudo python setup.py develop
 cd $DASH_DIR/openstack-dashboard; sudo python setup.py develop
 
@@ -356,7 +363,7 @@ add_nova_flag "--public_interface=$PUBLIC_INTERFACE"
 add_nova_flag "--vlan_interface=$VLAN_INTERFACE"
 add_nova_flag "--sql_connection=$BASE_SQL_CONN/nova"
 add_nova_flag "--libvirt_type=$LIBVIRT_TYPE"
-add_nova_flag "--osapi_extensions_path=$API_DIR/extensions"
+add_nova_flag "--osapi_extensions_path=$OPENSTACKX_DIR/extensions"
 add_nova_flag "--vncproxy_url=http://$HOST_IP:6080"
 add_nova_flag "--vncproxy_wwwroot=$NOVNC_DIR/"
 add_nova_flag "--api_paste_config=$KEYSTONE_DIR/examples/paste/nova-api-paste.ini"
diff --git a/stackrc.example b/stackrc.example
new file mode 100644
index 0000000..2d265d3
--- /dev/null
+++ b/stackrc.example
@@ -0,0 +1,36 @@
+# compute service
+NOVA_REPO=https://github.com/openstack/nova.git
+NOVA_BRANCH=2011.3
+
+# image catalog service
+GLANCE_REPO=https://github.com/cloudbuilders/glance.git
+GLANCE_BRANCH=diablo
+
+# unified auth system (manages accounts/tokens)
+KEYSTONE_REPO=https://github.com/cloudbuilders/keystone.git
+KEYSTONE_BRANCH=diablo
+
+# a websockets/html5 or flash powered VNC console for vm instances
+NOVNC_REPO=https://github.com/cloudbuilders/noVNC.git
+NOVNC_BRANCH=master
+
+# django powered web control panel for openstack
+DASH_REPO=https://github.com/cloudbuilders/openstack-dashboard.git
+DASH_BRANCH=master
+
+# add nixon, will use this to show munin graphs in dashboard
+NIXON_REPO=https://github.com/cloudbuilders/nixon.git
+NIXON_BRANCH=diablo
+
+# python client library to nova that dashboard (and others) use
+NOVACLIENT_REPO=https://github.com/cloudbuilders/python-novaclient.git
+NOVACLIENT_BRANCH=master
+
+# openstackx is a collection of extensions to openstack.compute & nova
+# that is *deprecated*.  The code is being moved into python-novaclient & nova.
+OPENSTACKX_REPO=https://github.com/cloudbuilders/openstackx.git
+OPENSTACKX_BRANCH=diablo
+
+# openstack-munin is a collection of munin plugins for monitoring the stack
+MUNIN_REPO=https://github.com/cloudbuilders/openstack-munin.git
+MUNIN_BRANCH=master