OK, from my own setup on windows I have found this

To be useless. The problem is audio. It comes with software that allows you to RECORD with audio, however do anything outside of that software and you do not get sound. So I can stream with it... but with no sound. Even when you open up Flash Media Encoder, it brings up an audio bitrate error message straight away. I would not recommend this for windows users.
I have just purchased this - Pinnacle Dazzle DVD Recorder

It has component and S-video input and connects to your machine via USB. Installed it on my computer here at work and flash live media encoder picks it up no problem with no errors. I will put up a test stream when I get home.