http://www.secmaniac.com/february-2011/building-the-ultimate-bad-arse-cuda-cracking-server/
http://blog.renderstream.com/?p=959

They do not sell the motherboard by itself but do sell a barebones server for 5,195 USA.
Prices do not include tariff, VAT or shipping and payment is expected at time of order using wire transfer.

http://oi52.tinypic.com/oj03yw.jpg