The DMK is still only 640x480 - good for animations and montages but not for a single high-resolution image suitable for a large print.
Not a bad idea I guess though, Al's shots with the ToUcam came out pretty good.
btw I've got the Canon 75-300 (stock lens), not the Sigma. The Sigma is better quality than the stock Canon.
RB has a very nice big white 300mm lens that maybe I could borrow.. but he might be using it that night