Other sound/lights/music related forums you might "expatriate" to.

[RoadRanger]

http://cacophony.aspinock.com - Where you are right now .
http://www.exilecentral.com - Another HC 2.0 refuge.
http://www.melodymania.com -YAHCR .
http://www.theopenjam.net - New home of Open Jam?

http://srforums.prosoundweb.com - Sound Reinforcement (kinda hardarse). 
http://www.proaudiospace.com/forum - Pro Audio Space (kinda lame).

http://www.recordingwebsite.com - The Recording Website.
http://www.gearslutz.com/board/ - Another Recording Website.

http://www.talkbass.com - Electric and Acoustic Bass.
http://ebassist.com - More Bass.

http://forums.musicplayer.com/ubbthreads.php/forum_summary -
The music player family of magazine forums are a lot like Harmony Central, in fact, Craig Anderton's SSS used to be there. There are forums for guitar, keyboard, bass, recording, etc. and the Bandwidth forum, moderated by HC's Jeff Da Weasel (Zak Claxton), is similar to BSWTB.

http://gear-monkey.com - Guitar forums + reviews
http://markweinguitarlessons.com/forums/forum.php - Mark Wein's guitar forums
http://www.MovetheMics.com - Recording forums

http://www.18watt.com - Tube amp info.
http://www.thegearpage.net/board - TGP
http://www.sweetwater.com/forums - Sweetwater's forums.

http://www.tdpri.com - Telecaster Discussion Forum (Re-Issue)
http://www.rig-talk.com/forum/

http://www.univalve.net/vbulletin/
http://www.sevenstring.org -
http://www.MWGLforums.com - Forums for Guitar and other B.S.
http://www.guitarampmodeling.com -
http://www.maplifiers.com - Down?
http://www.sputnikmusic.com/forums -
http://forums.birdsandmoons.com/forum -
http://www.mylespaul.com/forums -
http://www.lespaulforum.com/forum -
http://www.thefenderforum.com/forum -
http://www.hugeracksinc.com/forum -
http://fretwar.com -