All you have to do is sign up with the site. Then they ask you sign sign up with only one of their offers. You can find an offer where you only have to pay $6 for a trial version of whatever they have or something like that. Other offers, like the BMG music offer, you can pay like $40, but you get 8 CDs. This is the one I did and it worked. Then after you sign with them, you have to wait a few days for the credit from that offer's membership to go through to the free ipod site. For me it took about 10 days. So then when your credit goes through, you can cancel your membership with that offer so you never have to hear from them again.
Then all you have to do is refer 5 other people to do the same thing and they'll send you an ipod in the mail! You can choose from a 20 GB, an ipod mini or if you already have an ipod, you can get a $250 gift card to itunes! And I know that this really works because a few people in my dorm have gotten theirs and my own brother got his ipod! You should really invest in this before it gets to big and they stop offering it anymore!!!