I would be more interested in ATI's Dual chip card. I'm not so interested in the 9800 now because it has become more of an 8900GX2...
The R680 or whatever, is going to be two chips on a single PCB, so I hope that design will scale much better than a "Compacted" form of SLI.
The 9800 was declared to maybe be 30% more than an 8800 ULTRA, a big turn-off from the originally pronounced THREE TIMES AS POWERFUL.