any sites done benchmarks with the graph things? are the drivers supporting 9800GX2 SLI out yet?

I think it would mostly depend on the game.  
 
But dual GX2 has 4-gpu as compared to the 3 in the Tri-SLi.  And Tri-SLi doesn't seem to scale very well in the only game that needs more than 1 (or 2) GPU, Crysis.

I think it does very well in Crysis according the amandtec review:
 
http://www.anandtech.com/video/sho [...] i=3275&p=5
 
The thing with the GTX is you can find factory OC cards like EVGA 770Mhz, the max on the GX2 is 700Mhz I think. So in games that don't scale well the GTX will be better.
 

I think this 3-way technology is still new and, yet to make solid performances in games.
In fact, I don't think any games have true support for 3 GPUs...

3 way Sli actually does worse in some games than 2 Way sli. I think you'll see benefits at higher resolutions.
 
btw
 
wat do you mean the max is 700 mHz for the 9800 GX2 I have it easily at 740, I don't want to push it higher because its a new card. :|

I'd say dual GX2's seem to do better. PLUS  you do not need a Tri-SLI compatible motherboard either which is a savings.