People have been posting a lot HERE, where the cool people troll
The other forum I deal with a lot is the theatre-sound listserve, which is largely (as the name implies) theatre- all LIVE sound, but few of the bad seed types. That's a great place to discuss Cadac, Digital consoles, Sennheisser RF, intercom, and infrared video to name a few topics.
Hope this helps!
JvB