A couple of weeks ago, PostRank revealed their Top Blogs of 2009.
The ranks are based on what the company called "engagements" - basically how people interact with a particular blog post. Posting a comment, making a tweet, or voting one digg count as an engagement event. PostRank aims to analyze these engagements throughout social media - kind of like what Technorati has been doing in the blogosphere.
I'm tickled to find out that Neatorama won in the field of Oddities! But that aside, the entire list provides quite a good starting point in discovering blogs in many different niches: Link - via Lijit