Update: Beta 2 Released! See the Gaebar Beta 2 announcement.
I started out by downloading the source for the shell app via a link on a post on the PyAMF blog. Unfortunately, the link was to the wrong version of the shell app (I've since informed the PyAMF team and Nick's fixed the link.)
This is a quick screencast to show you the data export solution I've created for Google App Engine that lets you backup your application's datastore and restore it either locally on your development machine or on the same Google App Engine application on the deployment environment or on a different Google App Engine application (which you can use as a staging environment).
Release notes (Wed 6 August 2008) follow:
./manage.py shell.
To install iPython on OS X Tiger (yes, my Leopard discs are still safely in their box since I downgraded and I don't see any reason to bring them back out yet), I followed the following steps: