Social networking and casual gaming? There is also social gaming and casual networking.
An example: The Casual Collective. This online place was created by David Scott and Paul Preece in 2007 in Usa. They are two game developers that joined forces to create this social gaming and casual networking website to showcase their single and multi-player flash games. Registration is free.
In addition to games, The Casual Collective also has social networking features, such as profiles, status updates, private messages, public forums. It aims to build a strong community and high quality games. Among other features, there is The Casual Collective Radio. And these are The Casual Collective wiki and the Casual Collective Blog.