Re: stereo 3D questions
Ah, thanks! That helps. So for a 4-wall, active-stereo projection system, it sounds like I would need 2 QuadroFX cards and a matching G-Sync card.
For the passive stereo questions, what I was actually thinking of was two passive-stereo polarized projections showing different views (front wall and side wall, or front wall and floor, for example).