Sources for A/V Room Information

I've just bought a new house as my Music / HT system has grown too large for the current house (sound familiar?).
I've decided that I'll dedicate half of the basement (15 x 20) for the HT. As the ski season is about over, I'll now have about six months to obsess on this room.
The system is decent (ML SL3's, Cinema, Aerius i's, Proceed, Bryston etc), and as the room is unfinished, I have the opportunity to do the right thing for a dedicated music / HT room.
Does anyone have good net sources for info. on some of the basics like wall treatments and colors, ceiliing materials, etc? I know I'll be putting in dedicated A/C power, but the rest is still, up-in-the-air.
Thanks in advance - Snofun3