Les is correct. Unfortunately, those other webcomics general purpose message boards seemed to wither and die as well. Nowadays, it seems the only lively webcomics general message board is http://websnark.com
, which of course is Eric's personal blog, and which isn't set up for posting new threads, just responses to what Eric posts.
I really liked the good old days when hype and discussions were mixed together; that meant that people would actually see the hype, and there were plenty of interesting discussions to take part in.