In my opinion, the only thing that iTunes has going for it (as compared to wmp) is it's nice online music store, which is far superior to anything I've seen before. Unfortunately, purchasing music online doesn't particularily excite me. Beyond that, their interfaces are on a par with each other, and wmp seems to provide options that allow you to search for album information (complete with pictures, reviews and band information) better than iTunes. I dl'd iTunes as soon as I heard that it had been released for wintel, expecting something fantastic, given that everyone with a mac raves about it, and I was dissapointed.
(Why is it a penny for your thoughts, but you put your 2cents in... somebody's making a penny...)