I took a couple music theory courses in college years ago. One of my professors mentioned that he noticed a correlation between those who were good at math and those who tended to grasp music theory readily. He had no explanation for this though.
I'm told IBM did a study trying to find a way to figure out the commonalities between great programmers (versus merely good ones) and the only thing it revealed was a slightly higher interest in music.
Of course, music is a very mathematical thing.
squeakland@lists.squeakfoundation.org