A recently-launched feature on Cartoon Network's website called Game Creator lets fans of the new show Ben 10: Alien Force build their own platformer levels and present them to the world. It's been an immediate success, garnering 380,000 unique maps and over 20 million game plays in one week.

Leveraging the power of the audience as content creators is a brilliant way to build up a brand, and ensures a steady stream of visitors to the site. There is no greater advertisement than word-of-mouth, and getting to offer something to the community makes visitors feel valued. We'd love to see other sites offer creator tools like this.

[Thanks, Jessica!]