rubycocoa-talk is an email list for discussion of RubyCocoa. It currently is also the official channel for discussing bugs and submitting patches. rubycocoa-talk is archived at SourceForge.

The online bug tracker for the RubyCocoa project is here on SourceForge. There are currently several known problems listed there.

Don’t hesitate to look over at the PyObjC project also. It’s been a bit more active than RubyCocoa and includes some great examples, many of which use features that have RubyCocoa analogues.