It was probably me you saw streaming. Here's what I have:
I'd reccomend any of the cards you see here, it just depends on what available slots are on your computer, or if you'd rather have a USB one. Just make sure it has a composite(yellow cable)/S-Video input. I have my system hooked up to it, and I plug in the audio inputs(the red and white cords) into the Line-In port of my sound card, by using one of these:
You can find something like it for really cheap at Radio Shack.
Then on your Volume Properties, you set the Record tab to Line-In. Alternatively, if you have an external microphone(or a webcam with a built-in mic like myself), you can set the recording source to that, so you can provide commentary while you play.
You can use the camera features in Mogulus' studio, but I'd rather use the Flash Media Encoder, since it provides much better quality video. Once you have all the items you need, just follow the FAQ on how to set that up: http://www.mogulus.com/userguide/ind..._On2_Flix_Live
Now this part's completely optional, but I'd reccomend it. If you want to actually play the game on your TV, while at the same time having the video feed go to the capture card, get one of these:
Again, you can find one for cheap at Radio Shack. Plug the male end to your TV/switcher/whatever you have, plug the game console into one of the female ends, and run a composite(yellow) video cord with two male ends going from the other female port to the input on the video card. It will make the games much easier to play.