I'll have to wait until I get home to check. I currently have 3 Logitech QuickCam Communicate STX cams (USB 2.0) connected (only two of them are actually live -- ftping to my web site) and for the longer distance (Critter cam) I ended up getting a D-Link DCS-900 ip cam.
You can check the cams out at http://www.netrocam.com
. Two of the 3 cams under menu item Rich's place are operational, and the 1 under Critter Cam. I seem to have a software (could be hardware I guess) difficulty when trying to operate all three USB cams at the same time. I'll get home and find that the system had rebooted itself.
I would still like to extend one of the USB cams. Will post after a test.