Reiman Publications has a BB, but it has a lot of off-topic posts in with the food posts. Also, Readers Digest bought out Reiman and plan to make the BB available only to the people who subscribe to one of the magazines published by the Reiman division.
I used to like kitchenlink.com - haven't been there in a long time though. People changed, came...
and went, found myself there with a bunch of people I didn't really know after they took away their forum (and promptly brought it back in a month or so).
while there are interesting things if you dig far enough, they could not hold my attention for several reasons. Mimi's site is the best by a long shot. I don't even bother going anywhere else now.