GM,If you're interested, check out post #6 in http://audiokarma.org/forums/showthread.php?t=76361
to find the .jpg files of the plans I mentioned.
I took some measurements tonight, it looks like cabinets would have to be no wider than 21" to share space with the TV cabinet. Height is more or less up for grabs and depth should probably be no more than 21" as well.