I had a couple of external USB webcams sitting around and thought it
would be great if I could use one of these with my Mac to upload image
streams to Sensr. I used an application called EvoCam and a USB
driver called Macam to make this all work.
I wrote up how I did it in an article entitled "EvoCam external USB
Camera on OSX to Sensr"
http://www.tsheffler.com/blog/?p=252
Hope you find it useful,
Tom