I don't know if only my ATI-all-in-wonder-128 is doing this but just recently I encountered a funny function. when I run the TV modul of the MMC with the input being the composite plug (from my VCR) and I minimize the program window, suddenly the video is showing as the wallpaper on my windows desktop. kind of an animated wallpaper you could say. quite funny to have a movie running in the 'background' while working on something or surfing.
It's not just your AIW. It's actually a feature of the TV app called "Video Desktop". You'll find it under Setup, Display.
I think it's a really neat feature myself!
Yeap, I use it too on my Radeon. Tucked away on my desktop while I do other business.