After a few quick searches t seems that there is an android-gdata project on Google Code that seems to be the work of a single author. I didn't find any documentation for it and don't even know if it's production ready yet.
An older option, the com.google.wireless.gdata package seems to have been removed from the SDK. It's still available in the GIT repository.
Before I invest too much time with either approach I'd like to know which is the best supported and least painful.
