There are some great blog search engines out there today like Technorati, Google Blog Search and Sphere. However, they all have the same flaw; they don’t block spam blogs.

Not one of the three blog search engines listed above do a very good job, if any job at all, of blocking blog spam. Do a search for some sports gear, like “wrestling shoes”, and there is a great probability that more than a few results in the top ten are spam blogs.