I'm using 2x 295s and the drivers
currently don't "officially" support it in the current drivers. However, one of my 295s
is the kind that can drive 3 monitors on it's own, so I gave Nvidia surround with only one 295 a try - It works just fine, and the setup is officially supported according to the requirements page. (
http://www.nvidia.com/object/3dv-system-requirements-surround-technology.html) I saw similar frame rates (a bit lower, due to my weaker CPU/RAM) as the review Ibrin posted. Just make sure you purchase the dual PCB first generation GTX 295, that has an HDMI port. The single PCB /co-op edition card which lacks that HDMI port will not work with surround on it's own, you'd need a 2nd 295. Getting surround setup with the single 295 was a snap, no issues at all.
This is an example of one of the cards that CAN power 3 monitors on it's own:
http://www.evga.com/articles/00446/
This is an example of one of the cards that CANNOT power 3 monitors on it's own:
http://www.evga.com/articles/00478/
Be careful when browsing ebay or any site for these cards, I saw people frequently pulling images off places like Newegg and Tigerdirect, depicting a dual PCB 295, when they we're actually selling a single PCB 295.
As far as success goes, yeah, the setup works, but it gets choked up on VRAM in various games, especially Crysis. You should check out Paradigm Shifter's review on his 460s to see exactly how far VRAM goes in the surround world. The 295 only actually has 896MB of VRAM that it can use, before it starts offloading to system RAM.