Never been a fan of multi monitors... for gaming at least, i like my monitor nice and central! The only benefit, as some of my clan have, is to have games running on one monitor and IRC running on the other, but to be honest i couldnt be arsed. The last thing i want when im playing ra2 or other dm games online is to be able to see ppl chatting away out the corner of my eye.
However, it would be good for my video editing projects as it allows more of the timeline to viewed at once, although i run at around 2000ish res anyway, so everythings that small it almost all fits in regardless. A nice widescreen plasma would be good for that like, although i dont know if games would look too good stretched along the screen.
That huge monitor looks sweet though