6 full MMQ's from www.btcfpga.com (24 Modminers @ 210 MH/s)
750w Toughpower PSU
12 port Satechi USB http://www.amazon.com/Satechi-Power-Adapter-Control-Switches/dp/B0051PGX2I/ref=sr_1_1?ie=UTF8&qid=1345849738&sr=8-1&keywords=12+port+usb+hub
Ubuntu 12.03, BFGMiner 2.6.4
This rig nets 4.4GH/s at the pool. Haven't measured power usage, and heat is pretty negligable. I put a fan on it anyway and it seems to help keep it very stable.
That's a hell of a stable pool too - 26000 shares and less than 5 rejects? Impressive.