Squidoo

http://www.squidoo.com
Squidoo allows anyone to create pages of information and earn a little bit of money from advertisements. Here’s how it works: Members share their views or give recommendations on a topic/product of choice on one page (or squidoo lens). Squidoo places affiliate ads from Amazon, eBay, CafePress and/or SuperStore on the page and anytime a reader purchases a product through the ads, the contributor receives 50% of the royalties.

There are also Google ads on each page. Revenue from these ads are placed into a pool and half the amount is distributed to contributors based on the popularity of their lenses. Members can also donate earnings to charity.