I bought some stuff from Rockler (basically a wood working place). They spammed me with the following:
http://www.rockler.com/ecom7/product_details.cfm?sid=V5736&offerings_id=11184To me, this seems expensive (it doesn't appear to have shelving with it), but it really looks nice in the pictures. It holds 300 pounds, which isn't that bad.
Anyway, for anyone who's building their own stereo/HT room, this is something to consider.