Remember free iPods?
Ever since I got my free iPod, I've wanted another one with video.http://ipods.freepay.com/?r=16298530
I signed up with the true.com offer. It's a well-known company and you won't have to worry about being taken. It's also very easy to cancel as soon as you get credit for completing the offer.
Feel free to cancel the offer as soon as you get credit for it. You can't get the ipod yourself unless you complete an offer and get just 5 other to do the same. It's simple and it works :D