KernelTrap has an interview of Timothy Miller, who is behind the Open Graphics Project, with the admirable goal of creating a video card that works well in 2D and 3D on open source platforms. Well, Linux, mostly, but my hope springs eternal for 4+ multihead 3D displays. Engineering samples are/will be available for anyone who wants to work on a DragonFly-specific driver. (thanks, BSDNews.)
A running description of activity related to DragonFly BSD.
4+ multihead???
Been there, done that.
see: http://www.colorgraphic.net
They offer 3D on the primary screen of one of the cards, and I assume the rest would be 2D. A cheap Matrox, or several PCI cards would work if I didn’t care about 3D.