So I found the Apple iTunes developer stuff. Contrary to what I remembered it is free to download the API for iTunes. While they give you working code, it is pretty ugly as far as being a visualization. I have hacked it a bit to get a feel for it and have re-implemented the effect that I created way back when by rewiring an Apple
So if you have a Mac you can see it. This similar to the WinAmp viz I posted before, but this version is much better. It scales properly and is green on black. Grab it here:
As usual, unzip the file and place it in the user/Library/iTunes/iTunes Plug-ins/ directory.
If the direct link doesn't work, there is a link in the "links" section towards the bottom of this page
As I put more effort into this I will probably make a page for it, maybe on a
Edit: corrected second link. It is probably the one to use.