USB may be your easiest/cheapest route, although I don't know what kind of bandwidth 4 cameras will take up. Also, the distance from computer to camera will be limited by the USB spec... the cables aren't suposed to be much longer than about 10 feet, I think. You can get an overview of supported USB cameras here: http://www.qbik.ch/usb/devices/showdevices.php3?id=9 If you want to use composite video signals (should be able to have longer cable runs) I'm not sure what your best route would be - I have a couple of sample cards that I got from brooktree for testing that are nothing but a bt878 chip and a composite video in - I wish they'd sell them. Maybe somebody does. I'm not aware of any cards with multiple inputs, but I'm sure someone on this list might know of something... HTH, -Eric
