I have some one selling an isight camera.I know its a rare item to find except on ebay.However, im wondering, i already have the new imac 20" with built insight. does having the external camera make much of a difference versus the built in one? It looks quite big for an external etc and does it have a mic too?? If i connect it to the firewire, will i have the choice to choose which camera i would like to make videos etc? bottom line in the end would be, having the external sight, is it better than built in ones. i noticed at macworlds, that jobs used the external isight so there must be some superiority difference in it. Also any idea if there is a new one coming out? any advice..thanks!