it's not too hard to set up if you have a long enough Firewire, USB cord..
But, there's not a lot of options for Mac webcams..Everyone is just going to tell you to get the iSight or the Ice cam. The ice cam won't be good enough quality for what you want, and the iSight is $$, you might be able to use a Logitech quickcam if you have an older version of OS X.