Using the PS Eye for video chat in Windows
While there are no official Windows drivers for the cam, some wonderful souls managed to discover what its innards are and not only reverse engineer drivers, but also they've developed a wrapper to allow its use by Skype and other such programs.
The first link is to the insanely long forum post that outlines the development process (and sort of serves as tech support, though it all works pretty seamlessly). The second link is to the driver download page. Half a meg gets you the driver and the wrapper. The install is quick and painless and, once you restart Skype or whatever program you wish to use the cam with, you're off to the races.
Enjoy, my gdgt brethren: