iTunes' Taxing Problem

I recently noticed my app purchase from the iTunes Store had sales tax, while my previous music purchases did not. In doing some digging, I discovered the way in which digital purchases are categorized varies widely from state to state. In my home state of Pa, music is tax-free, while games and videos are taxed. Don't get me wrong, I'm not proposing everyone get taxed on their purchases, but it would be nice (and make fewer headaches for Apple) if there could be more consistency in taxing digital downloads. Here's a chart of how taxes are currently handled in different states. For more info/specifics visit Apple's page on the subject. (An "X" indicates tax is charged.)