I signed up (skeptically) for swagbucks in 2009. All you do is use SB as a search engine (powered by google) instead of google. Randomly you "win" swagbucks when you search. You trade the swagbucks in for prizes. I always choose the Amazon giftcards. I totalled $65 in 2010. Sweet!
If you want to try it - I'd appreciate you using my referral code..