As far as the Python/Ruby bridge support, they are just endorsing them and improving them. I would be very surprised if any work has been done to integrate the Obj-C GC, as in both cases the Python/Ruby GC is already handling retain counts/autorelease pools/etc for you (the result is you rarely have to worry about mem. management). There is a developer (Laurent Sansonetti, as mentioned in a previous comment) at Apple who has very actively working on RubyCocoa as of late. He has a branch in SVN (apple-unstable) if you want to check it out; the last commit was 2 hours ago :).