Some details on rooms I use for the reviews published in AVSA.
My home listening room is relatively compact, and narrow, but dedicated to audio. It's about 6m long and 4 m wide, and has slightly irregular shape to combat standing waves. I basically run two systems, one 'small' and one 'large' to be able to contextualise the equipment I get for review a little better. Floor is carpeted, there are CD racks and LP racks all over the place, and the ceiling is conventional ceiling board, but with big bales of insulation to allow for better absorption. Ivan Lin's bass traps help with bass control, too. More details on actual kit can be found on the contents page of AVSA.
The home theatre set-up is in the lounge, which has a fairly modest footprint, but a very tall double-volume ceiling that is in excess of 10 m at its highest point - so, lots of air. Also, open plan, making surround sound speaker configuration problematic, but not insurmountably so. I use sat/subs, and stand-mounted rear surrounds, with wall-mounted centre backs. I also run a LAN-based music/movie server system, which allows for reviews of Mvix-type units and servers - a trend that seems to be growing.
For really big gear (B&W's 801Ds come to mind) we use the AVSA sound room, which is more neutral environment, but very useful because it is quite spacious and can be used for stereo and home theatre reviews. We will all dig for some pics.
Talking of which, I will post some images of my room after the end-of-year spring clean - it's a working space right now, and not exactly suitable for use in Habitat or Garden and Home ...

Deon Schoeman