I had a freetrack I made about a couple of years ago (3point one with cap). Worked like a charm with IL2, but when I upgraded to Windows 7 x64, my old webcam was useless (no drivers for 64 bits, and no hope of getting one, because it's "discontinued" in the manufacturer' site).
It's a really good thingy, considering it's free. Too sad I'm too lazy to go out looking for a webcam that works with windows 7 x64
I'm running Windows 7 x64, and just picked up a cheapy Logitech C250 ($20 at Fry's), and it works like a charm (at least for Face Track NoIR). I don't know (doubt it) if it's running 64-bit native, but it runs fine. I'm pretty sure just about any webcam available in stores today will work with Windows 7 x64.
You'll likely have to put an IR filter over it, or remove the visible light pass / IR filter to get the best results with Free Look, if you had to do it before. Or if you don't mind the extra CPU hit, try out Face Track NoIR, so you don't have to look like a Christmas Borg. If that doesn't work out, you can always convert it for Free Track. I have a thread in the Off Topic Gaming section on it.