The only info I've found is

http://groups.google.com/groups?q=carbon+group:comp.lang.ruby&hl=en&selm=B72F3122.1CF%25cyberelf%40mac.com&rnum=1

which is asking for someone to take over the carbon project;
apparently
it had no takers.

The only reason I'm interested in Carbonized ruby is that I was hoping
to embed ruby in a Carbon application (the application must remain
Carbon).

Thanks,
--Matt