I also have 20 USB Block Eruptors on the way, but for now, this is what i have running at work (free power!)

ATI FirePro S10000
ATI FirePro V9800
ATI FirePro V9800
http://www.dopelabs.com/images/btc_miner_01.jpg

ATI FirePro V7800 x 3
http://www.dopelabs.com/images/btc_miner_02.jpg