"Facebook is the next gaming console." These are the words being spoken by venture capitalists and entrepreneurs in Silicon Valley these days. A few weeks ago, Inside Facebook profiled the top game developers on Facebook. While there are many more developers of Facebook games that are growing in popularity, two companies – Zynga Game Network (Zynga) and Social Gaming Network (SGN) – are taking a different approach. Instead of just building games, they're building "game networks" in an attempt to become the largest game distribution channel in the social networking world.