I actually got a free I-pod last year by doing this. You need to get 8 people to sign up and complete an offer and then you will actually get a free xbox 360, PSP, or I-pod. No joke. It's not as easy as you might think, but easy nonetheless. Go to this link:
http://xbox360s.freepay.com/?r=21978949
The fastest way to get credit, in my opinion, is have them buy some printer ink from the link towards the bottom after you sign up. Either that or have them sign up for the Blockbuster movie rental thing.
Seriously, I did this last year and got a free I-Pod. I had about 5 members from my family sign up and had about 3 people i told online signup as well. As soon as I had my 8 points I completed the form online and about 2 weeks later I got my I-pod. A freind of a friend got a free PSP this way too. Check it all out here:
http://xbox360s.freepay.com/?r=21978949