You should check out this great site called MILESOURCE.com. You earn AwardMiles for doing the things you do already such as visiting websites and shopping at stores like Amazon.com, CDNOW, JCrew.com, and others. By joining early (membership is free), referring some additional friends, and taking advantage of all the site has to offer, you may never have to pay for airline tickets again. Check out:
http://www.milesource.com/join.php3?referrer=hols4

If you travel at all, this is a great deal.