Here
http://www.butterflylabs.com/products/The Single and the Mini Rig are FPGA devices, they are a bit expensive but their energy consumption is much lower than using GPU and they were released months ago.
and then we have the preorder list "BitForce ‘SC’ Pre Orders". These are the ASIC devices. They will be released like in october/december (at least, that's what BFL said...)
Their performance? They are ASIC, no FPGA. Look at the "Single 'SC'", for only 1299$ you buy a device wich do 40GH/s. Yes, 40GH/s, yes for only 1299$