A leeked benchmark reveals that this card kicks some serious ass! What's more, the dual-core version of this card, currently named the X2900XTX2 - awlful name - will probably retail at around $600... a bargain!!!!
Full benchmarks against 8800GTX and X1950 Crossfire... and some others:
http://level505.com/2006/12/30/the-full-ati-r600-test/1/
There's also more information here... of course:
http://en.wikipedia.org/wiki/Radeon_R600
So... what do you think? Must have christmas prezzie or waste of cash... I vote BOTH!!!