Both the GTX 260 and GTX 280 are beasts with in themselves, they may even see better than a 9800 GX2.
NVIDIA's site for em
EVGA's plans for em
now with EVGA's editions of em... i got kcik out of one they call the FTW edition... and yes that means " For The Win Edition"
As for price? I've seen the GTX 280 start at $650 and only go up from there, the FTW edition is $700 and already sold out at newegg. The liquid cooled version... $930CAD at NCIX and sold out at TigerDirect.
Chance Im getting one? none

Now obviously the all important question is will it run Crysis on all highest settings... that answer is still no.