Update:
See our XFX 9800 GX2 Video Card Review

Tweaktown already received a NVIDIA GeForce 9800 GX2 card. They apparently got it from an anonymous source. In any case they published a review of this upcoming card.

Quote from the review: "We’ve all heard about the GX2, so there isn’t much to say here; there’s no package so we’ll get stuck straight into the card and talk about its specifications before we get into the benchmarking.
The main thing to compare here today is the performance of the 9800 GX2 against the HD 3870 X2 from AMD. We’ve also thrown in the 8800GT, as the specifications on a single core of a 9800 GX2 is only slightly above that of an 8800 GT, this should mean that if a game doesn’t take advantage of SLI then the performance should only be just above the single 8800 GT."
Read the full review on Tweaktown. Find the newest graphics cards on NewEgg.

See also the 9800 GX2 overclocked review.