Just out of curiosity, who keeps their iTunes library on their computer?? My entire library is kept on my external HD, and I stream it to my computer over my Airport Extreme base station. I have a 180gb internal HD in my MBP, and a 30GB song database.... I feel like it's a big chunk of my storage, and since I'm a frequent track-skipper... I think it's less wear-and-tear on my internal HD... But the lag of the external HD has me re-thinking what I'm up to... So where's your music library???