so, I finally completed a project I've been working on on and off for the past month or so -> http://www.winmystuff.org There's a lot of PHP code running the backend of things - basically the site encrypts the users IP address, stores it in a database for tracking and assigns a referral ID to the user. Every time the user refers someone else who has never been to the site before, they gain 1 point towards an entry into the current contest. Once they have enough points for at least one entry, an AJAX enabled form is displayed for them to enter their contact details. All further contest entries they gain automatically are credited to their account. The whole concept relies on ad support, of course. Whether or not it will be successful, I have no idea. It hasn't been approved for adsense yet, so I just have a couple buy.com affiliate banners on there temporarily..