I found it to be a great way to manage all of the different Internet broadcasts I listen too, as well as a simple way of finding more.
I wrote a short HowTo on my website, if anyone is interested.
To be honest, I haven't tried a video stream.
Logically, it should work, as StreamTuner launches XMMS. So, if you have XMMS with the proper video drivers (like MPlayer) installed, it should play a video stream the same as an audio stream.
Hey, did you try video streams with it? Does it work?