hi All,
We have released MXDEye, It is so easy now to get the webcam input on web for unity through flash using our MXDEye tool even without the need to write a single line of code, check it out and start building AR, Chat and other amazing stuff 
http://u3d.as/content/mixed-dimensions/mxd-eye-webcam-input-on-web/1Ab
Or just try it out here:
http://mixeddimensions.net/MXDEye/
Tested on all modern browsers
By the way it works on indie and even has not been restricted by the Unity 3 sandbox and has been tested on many browsers both on Windows and Mac
Very nice. Seems to suffer from low framerate thou 
The framerate is dependent on flash and its capture to your webcam so it is actually dependent on the machine and flash,this tool tries to get the highest framerate for you webcam and then send it to Unity, for my laptop it is 25 fps which is quite good some other machines are higher and some others are lower
Looks very good!
a question …
I am curious how you did the Flash to Unity communication …
Did you use some Flash to Browser/ Browser to Unity (javascript) communication?
… because socket (TcpListener) programming is not allowed in the Unity WebPlayer sandbox.
Yes, its through the browser but it required a lot of optimizations to work at a high level of quality and speed