This is completely free, just redeem the code "STUDENT3" on US Amazon's
MP3 Promo Code Redemption Center and you'll get an instant $3.00 credit in your account. The catch is that you have to spend that amount before November 1, 2010 (11:59 PDT) and you can only use it to get MP3s.
* I was hesitant about posting this since this isn't an ebook freebie, but I figured a lot of people here have iPods and might like the free credit. If this isn't allowed, I guess a mod can delete this...