Apparently, no. Ecamm was supposed to produce one, and there are several June tech articles about it. But, the actual product is just for MAC, as they determined it was too hard to make it work for the iPad or iPhone OS, which is ridiculous, because there isn't a mac under 6 years old, that doesn't have a camera, and, even a camera for the mini can be had, in higher than VGA res, for under their $149 asking price.
This is going to make some people mad, because the articles promoting it, all say it is for the iPad.
A company called Photofast, has allegedly created a USB tethered solution to be released "later this year" for an ungodly $187.
Common people? We can jailbreak, overclock, add 3rd party apps etc, but not hammer fit a basic webcam? If they can write generic, BT keyboard drivers, they can write a BT webcam driver.