Funny you sould ask that, I have just bought a VR system (2X Virtual Research VR4 headsets and tracking module)
The problem is connecting the darn thing up, It needs to individual video inputs, I intend to hook it up to my A3000 (Which has two video outputs) but they are not off set so I may end up cross eyed quickly..
I read a thread a while back where someone mentioned that he could play Quake against his firend on one amiga using two separate monitors. I don't recall what setup he had but it seems technically possible. If any software supports such a setup for 3D glasses is beyond me though.
How much did you pay for the VR-thingies?