I'm currently finishing off a project that would have seriously benefited from html5 webcam support. The current state of things is really frustrating, in the latest chrome and firefox you can access a webcam and take pictures, but it's not possible to actually do anything with the video stream, you can't broadcast it to the server without horrible (and slow) hacks, so it's really crippled. That's the frustrating thing about html5 generally at the moment, it's eventually going to be awesome, but you can't actually use a lot of it yet.