DailyTech's got some details. Teraflop-on-a-budget, 'eh? I suppose that the budget for purchasing a similarly config'ed machine is definitely less than picking up a run-of-the-mill supercomputer. You can find some new photos of the R600 prototype card here, & boy is she a big 'un.

"Next-generation AMD Stream Processors with a single Opteron dual-core processor powered the teraflop-capable system. The upcoming R600 graphics processor powers AMD’s next-generation Stream Processors."