I know that you can use Yahoo messenger for broadcasting it, but then anyone who wants to see it has to have yahoo also.
I use Webcam 2000. You can download the full free version here:
http://www.webcam2000.info/ .
It is not streaming, what it does is updates a picture ever x amount of seconds.
hit me up on aim: xpalendocious for more info and a demo of webcam 2k.