Not in 2.1. But 2.2 will have that capability. It will require nearly no cpu and track at 100 fps. I guess you've been looking at johnny lee chung's wiimote projects, lol. There is no set date for the release of 2.2 yet, but it's close. i'm sure that would have been your next question ;).
Its in beta testing phase right now, so I wouldn't spend more than 20 dollars (logitech quickcam at walmart) on a webcam til it comes out if you expect to be using the wiimote later. I have bought a wiimote myself in anticipation of 2.2. Also, I hear its going to be compatible with trackir cams an so on.
I hope this answers your questions, and have a woderful day!!!
Marcus
EDIT: OOPS. must have been typing when you posted.