Google App Engine (GAE) and datanucleus support

I would really like it if roo's persistence setup options included GAE/Datanucleus as an option. I have begun the process of converting some of my spring web applications to run the GAE. Everything seems to work fine except the persistence stuff. I have tried to implement my own pom to add datanucleus/gae support to my existing projects but the results have not been encouraging. I would love to be able to use roo to generate my GAE persistence jar for use with existing apps and even use roo to generate new apps for use on GAE. Using spring with GAE in general is painful because the GAE plugin has no dependency managment features and spring's modules has so many jars.