prestans 1.0 alpha 3 is out, please grab a copy and let us know what you think
http://prestans.googlecode.com/files/prestans-1.0-alpha3.tgz
Note that the package only has the server side framework.
Also started a GAE Datastore Tips and Tricks Wiki page, handy if you
are using REST models with GAE models
http://code.google.com/p/prestans/wiki/GAEDataStoreTipsAndTricks
prestans is looking very healthy and we hope to start thinking about
packaging it up for distribution in the new year.
Enjoy.