I think it would be cool! I love open source stuff, and I love chatting.
http://advogato.org was the second ever social networking site, and it was for open source/free software people. It is still there, but I no longer use it for some reason.
http://lwn.net is a weekly news zine with vigorous and informed discussion in the comments.
You can always use a discussion site like convore for open source discussion.