Just want to extend an AC welcome to all the refugees. Yes, this is a pretty friendly place on the audio planet, though with so much growth, AC attracts some misfits at times too. Of course, there are common sense rules regarding behavior, particularly discussion about individuals, politics, religion, etc. Guidelines here:
http://www.audiocircle.com/index.php?topic=42856.0 Oh, and we have a "Sports Bar" circle for everything non-audio, including liquor (especially scotch!) and things deemed NSFW (not suitable for women)

Note also that this is AV123's own spot in the "Manufacturer's Mall", and is actually facilitated by MLS since Sean is no longer with AV123. If you're looking for broader discussion on subs, for example, the "Audio Central" circle might get you some good traffic and impartial advice on non-AV123 products compared to theirs. It also wouldn't be subject to AV123 facilitation in that location. There are many great sub/speaker manufacturers with circles here, some already mentioned, so take a look at ACI, DIYCables, Selah, GR, Salk, VMPS, Omega, Horneshoppe, Von Schweikert, Odyssey, SP Tech, RAW, AudioKinesis circles, among others.
As a "2+ year wait club member" for LS-9's and a satisfied owner of several AV123 products myself, I hope MLS sorts it all out. Perhaps having a "fall out" is part of the grand plan to become less of a social networking site and more of a manufacturer's forum anyway. So far, I suppose it's working. Who really knows, other than Mark, so it doesn't really contribute much to speculate further. He's gonna do what he's gotta do.
Life goes on, so don't let all this change drag you down. It's just change and it's a big world with plenty of room for everyone. And it's still just a hobby so jump in and have some fun... Try some of the other circles and make some new friends while you're at it. It's a great place.