Google has announced that they have added a new function when you're searching blogs. As you know, if you run a search and limit your search to blogs (using the left hand menu) you'll get to see blog posts and also a short listing of blogs that Google thinks are particularly appropriate. You can now click on the 'More search tools' option (towards the bottom of the left hand menu) and can choose 'homepages'. Alternatively, you may find the option already available, so take a look! The idea being that you'll get straight to the blog home pages of those blogs that are specifically interested in the subject that you're searching for.