I'm a bit late to the game on this, but February was a busy month...
We talk a lot about influencers here at SpeakerBox -- determining who they are and how to reach them. In terms of locating the top blogs on any given topic, Technorati used to be the gold standard. Recently, however, its been a different story for the blog search engine.
So how do you find the top blogs for your market? Marshall Kirkpatrick over at ReadWriteWeb pulled together an excellent comparison of six different ways (including pros and cons) of identifying the best blogs in any niche: Technorati, Del.icio.us, StumbleUpon, Google Reader Recommendations, AideRSS and Ask.com Blogsearch.
Well worth the read.