Blogger Search Engines

For the do-it-yourself PR pro, thousands of search engines exist for identifying and compiling target blogger lists; Technorati, Google, and Sphere to name a few. They can also check the ranking of the blog sites on their list at Alexa's traffic rankings services.

http://www.forward-moving.com/blog/2006/09/10/reaching-the-blogosphere-part-three-%e2%80%93-finding-bloggers-in-your-market/