Google Blog Search is no more - at least as a standalone offering from the search engine. Search Engine Land points out that if you go to its previous home - google.com/blogsearch - it simply redirects you to the Google home page.
You can still search through blogs specifically with Google's search tool from Google News. For example, if you search "SEO" from Google News, it will bring up a list of articles. You'd then go to the "Search Tools" box, and click the drop down where it says "All News". From there, another option is available for blogs.
At this point in the Internet's evolution, I'm not sure how useful the feature is. There's a lot of gray area when it comes to distinguishing blogs from other sources. In the end, it's really more about who's writing the story. Strangely enough, Google just did away with authorship in search results - the best indicator that. Go figure.
I doubt many will miss the Blog Search destination Google previously offered. There was a time when it was helpful, but there's really just not much need for it anymore. Still, you might say the Google News feature is even less helpful, as it is limited to news.
Image via Google