iTunes Stats
Alex King, is there nothing you can't do? The man behind Tasks and FeedLounge has offered up iTunes Stats for our consumption. It is still a little rough around the edges, but hey it is free.
Basically it is a little web app that you run on your own server (or personal Mac) that imports your iTunes library XML file into a mySQL database and creates a few reports based on that info. The beauty of this is that if you know anything about PHP or SQL you can create your own reports.
I've always wondered who I listen to more, Neil Diamond or William Shatner.