Wanted: CoolMatcher

I just stared working again and all my Obvious co-workers share their iTunes libraries over the local network. I'd like a small plug-in that just does a simple comparison between my library and theirs.

The first thing I'd like to see is with whom I share the most common musical tastes. It's an easy context-builder for new relationships.

Then I'd like to see what artists are enjoyed by multiple of my co-workers but unknown to me.

I'd think some sort of shared library analyzer plug-ins would already exist, but I couldn't turn up anything. Maybe iTunes doesn't allow programmatic access to the right data.