This is an awesome site that lets you search the web using their website and earn "swagbucks" which can then be redeemed for cool prizes like ipod touches, ps3's, xbox 360's and a ton more. I use this site everyday and have only good things to say about it. I've never been spammed and i expect to get something free in the mail very soon.
My referral link is: http://www.swagbucks.com/refer/BlakeB
Also, if you know about Lockerz (another GREAT free gift website, you should check it out) and need an invite, just shoot me an email at: firstname.lastname@example.org and i'll hook you up!