Google have a beta of blog search engine up and running here. It looks good, seems to work and does pretty much what you'd expect. I'm left wondering why it's needed though...
After all, how to you define a blog? How is a blog different to a product company's web site that happens to publish news and information via an RSS feed? Now that Google has categorised part of the search space as "blogs" I wonder if they intend to move these sites off of the main Google search; much in the same way that Google Groups separates news group postings ? It's far less clear cut than news groups...
Interesting times.