PR via blogs for launching a community website in the US

Hello I need a PR specialist, who know the most important blogs in the US for web 2.0, technology, culture, community etc. We are launching a community, soon available under uberIQ . com that only permits intelligent people to register. If you do not pass our intelligence test you cannot register on the site. We want to get exposures in blogs. Therefore we want you to: find relevant blogs which large reach , write a story about the site and intelligence test and send it to the editors of these blogs We expect an initial work where you should be contacting maybe the 20 most important blogs with a personalized letter and good story about our site. Therefore price is initially limited to $100. If you justify it we also pay more. If you do a good job we will hire you for future.