iTunes2Syphon is a iTunes visualizer made in Quartz Composer that sends mp3 track info as an image to a Syphon server so that it could be picked up and displayed in another application that supports Syphon. This tutorial shows how to install it and make it appear in Modul8 and in VDMX. It also gives you a brief look at the Quartz Composer composition and gives you an idea how you could modify the visualizer to your own personal taste. Download the iTunes2Syphon Quartz Composer source file here: iTunes2Syphon.qtz
If you are interested in learning how to enable Syphon input in Modul8, read this tutorial first.
[Edit:] This visualizer won’t work in iTunes on Lion if you are running iTunes in 64-bit mode. While waiting for the Visualizer bundle for Quartz Composer to get upgraded, the only trick is to swich iTunes to 32-bit mode. This is done by highlighting the iTunes app in the Finder and select Archive/Show info (or press cmd+i) and check “Open in 32-bit mode”. Thanks to Destoke for pointing this out. I won’t upgrade to Lion myself anytime soon.