Other than World of Warcraft, the biggest thing in gaming right now is casual gaming. Stimulated by the popularity of social networks, casual gaming has skyrocketed in the past few years. And, with Facebook becoming a platform for applications, casual gaming on social networks has skyrocketed as well.

The Social Gaming Network (SGN) is looking to become the platform of choice for casual gaming on social networks. In fact, it'd be more accurate to say that it is looking to become the platform-on-a-platform of choice. After all, the SGN's platform is build on Facebook's application platform.

The success of SGN is in reaching out to independent developers to become part of the gaming network. The $15 million investment will be used to provide more tools to these developers and help SGN become the platform of choice for social gaming.