Thanks for the input! After reading here and some other reviews, I think I'm going to pull the trigger on it. Although, I'm sure a 32gb version will probably be available at $350 in 6 months :P
It works well because T-mobile data speeds are fast enough, and only time I remember missing my music was when I was on a long 12 hour flight, and really wanted to listen to that one song, and taking out my laptop wasn't worth the effort.