New revised site list coming soon
Treasure Trooper Get paid for doing surveys, buying things online and affiliate offers
EmailCash Get paid for buying stuff from sites like dStore, MyCareer, Lonely Planet, VistaPrint. Also get payed for surveys.
If you are still skeptical have a look at these articles.
Wired.com article
Free iPod scam investigated
That Free iPod won’t come easy
G4 The Screen Savers review of freeipods