Re: SLI issues/concerns and stuttering (GTX 200, 8, and 9 Series)
No real problems, some stuttering but rarely and not enough to annoy me. The GT's and these GTX260 have very good scaling with 70-100% being normal. I went back to a single card a few months ago because I got a P5K mobo but I only lasted a week before I went back to SLI. I thinks it's superb and wouldn't be without now. Drivers are getting better all the time, too.
I played Crysis last night with about 30-60FPS avg and it was very smooth. I didn't notice any real stuttering at all.