Very concurrent garbage collector for ARC

Hello,

I've been working on an implementation of a concurrent garbage collector (based on Inferno's,http://doc.cat-v.org/inferno/concurrent_gc/) to warn the user and reclaim memory in cycles found in ARC during runtime for the GNUStep's Objective-C library.

Is there any interest on an implementation for Apple's libobjc? I could probably take some time to implement it as well, but I would probably need some help to setup the environment for the code on http://opensource.apple.com/. I'm not sure how I could propose a patch for Apple's libobjc.



Regards,
Paulo.