Yes, I'm used to 2 monitors as well, and it sucks to not be able to use them. In my case, my gfx card RADEON 9600se has the capability, but the screens aren't getting repainted very well. I don't know if it's the driver or X, but I used to be able to do it with my other PC with a RADEON 9600xt.
Dunno what the problem is, yet.
I'm willing to try out a new version of X and a different way of installing the driver than using Kano's script.
Until then, I'm mostly on Win2000.