The Geronimo JPA 2.0 spec API is currently being updated with the JPA 2.0 API updates defined in the latest JSR-317 draft. OpenJPA uses the Geronimo JPA 2.0 API to build OpenJPA 2.0 snapshot/trunk. Corresponding OpenJPA updates need to be made following the Geronimo update, so there will be a period when OpenJPA 2.0 snapshot/trunk builds may fail. I'll post when the update is complete.
The 1.x release builds will not be affected. -Jeremy