Obligatory screenshot (click for the full size version... don't if you're on dialup!):
I'm using an nVidia Geforce FX5200 dualhead with TV-out for the two left monitors, and an ATI Rage Pro 128 PCI card for the far right. Left-most monitor is a 19" Viewsonic PF790, middle is a 19" Mitsubishi Diamond Plus 9i, and the far right is a 19" Dell M90.
Yeah, it's really overboard... but people keep giving me monitors.