Napster - FREE 14 Day Trial! Unlimited Access to 3 Million+ Songs!
 

A few things to note here. The free trial is double the amount that they're
offering publically to anyone. Secondly, this is a fantastic alternative to
the iTunes options because you get access to ANY music at ANY given time. No
30 second snippet that doesn't really give you any idea of what you're getting
and should you decide that you want to own the actual song for whatever reason,
you even have the option to purchase the track itself! And thirdly, there's
no real restriction to which MP3 player you can use! If you're a true audiophile,
this is probably the only economical option since compared to purchasing songs,
you get easily 4 times (for someone like me) or more the value than with iTunes.
FREE 14
DAY TRIAL

• Update: If you have other
  Napster users, you can even share your playlist, songs, or whatever with your
  friends! Kind of like how all you university dorm room folks do it with iTunes
  (and the whole iTunes hack) but without the threat of Federal Marshals busting
  down your door.