This is known as the web trends map. Even the smallest sites on this map get lots of traffic and will most likely be untouched by internet marketers unlike YouTube, Facebook, etc. http://informationarchitects.jp/wp-content/uploads/2009/07/wtm4-final.png Look through this map and check out some of the sites and then figure out a way to start promoting projects using that site. For example, look at this site: http://us.cyworld.com Just use some methods that work on MySpace/Facebook on this site. These people probably haven't been exposed to these methods before and so even though there is less traffic you have a more receptive audience. Good luck.