Kind of a cool project we recently wrapped up...it includes a recess mounted 71" DLP TV-this is the first time we installed and played around with a Wii as well. The sensor bar for the Wii sits on top of the removable face frame for the TV. Other system sources include a Middle Atlantic Rack mounted xbox, PS2, Denon DVD player, and a cable box w/DVR.
At the bottom of the face frame are two slits for air intake (these aren't visible in the picture)...there is an in-line exhaust fan pulling air through the TV cavity-the exhaust fan is on a stat.