I got mine on order, its been shipped, and its scheduled to be here Monday.
I got a Core 2 Extreme, Quad-SLI, and 4GB of DDR2-1066 to slap in it, so we'll see.
I got the old nForce 4 x16 Asus board right now. Most games run fine but EQII crashes randomly. And you can't overclock this old board even 1% without causing problems. Its advertised as a Core 2 board but it feels like its just a temp fix.
The new board has an actual chipset to actually "support" C2D and supposedly better management of Quad-sli.
I wouldn't expect much if any performance increases, but it should have better stability for C2D and Quad. Which one would hope would allow at least a small bit of overclocking.
When I overclocked my board from 2.93 stock ghz to just 3.12 it increased my Aquamark score by 18,000 points. So even just a little can give a lot. I'd be content with a 20% stable overclock.