Do the glasses have two video inputs? If so, your best option (IMO) would be to use the iz3d driver (available in demo mode for 30 days, something around $50 afterward) in "dual projectors" mode. I use that driver and the compatibility is excellent.
For video cards, the driver is compatible with any modern ati or nvidia card. I'm quite partial to the ATI Radeon 5750 for a good performance budget card, or one of the 58xx cards if you want to add in some more performance. The 5750 will struggle with the double-rendering of 3d at extreme resolution and detail levels, but most of the glasses are relatively low res by nature, so you have a bit of leeway there.
2d-to-3d conversion... well, there are a lot of systems that claim 2d-to-3d conversion. Even Iz3d is experimenting with it. Most of the results I've seen have not been pleasant, though.