I just published a milestone release of the Gilead adapter for Google
App Engine.
It allows you to send your persistent entity to GWT without the
serialization exception that currently prevent it (see this
contributor thread for a long discussion about it :
http://groups.google.com/group/Google-Web-Toolkit-Contributors/browse...).
But what about the rest of GAE datastore classes like Text, Blob,
ShortBlob, User?
I have entities with the User fields. I assume it is not possible to
pass them into client and back via RPC without transformation.