I currently have 4 monitors. 30" Dell 3008wfp, 2 26" Viewsonics. 1 23" Acer.
I'm really looking to do a new build though just for games with 6 smaller monitors. Right now I have a 4870x2 and a 4870 for the 4 monitors that I crossfire for games. I'm running a Phenom II 940 @3.2 so even just one 5970 would be bottlenecked by the CPU currently. I'm probably going to pick up a Gulftown 6 core when they hit the egg to do the new build with, and keep my current setup for applications and programming.
My issue is that I haven't seen ANYTHING lately about it. That was the biggest thing they were advertising at press release, and got me excited, but haven't seen any word on a release of these cards (just like the 2 GB 5870s).