Animusic is an interesting technical achievement, but I find the overall results to be somewhat mechanical and soulless - it probably has something to do with the fact that all the music is usually written to make the animation work, and not the other way around. It's basically elevator music.
I would love, and pay for, an actual visualization program that could do something remotely similar to what it does, just to my music and in real-time. I just don't really care for the movies they end up with and sell. They do work well to demo home theater setups though.
