Use VCam to boradcast everything to USTREAM.TV
We know that USTREAM.TV can broadcast your webcam video, but did you ever think broadcasting everthing you want to USTREAM.TV?
e2eSoft VCam can help you doing this.
It can let you broadcast your videos, images, webcam video, desktop screen, DVD video, webstream, and even your mobile phone video to USTREAM.TV (or Justin.tv, etc.), with many kinds of video effects! Here's a small demo showing how to do it: