Google launched a new “homepage for Google Blog Search” that let you browse the popular stories in the blogosphere. The updated version showcases categories on the left side of the website and organizing the blog posts within those categories into clusters, which are groupings of posts about the same story or event similiar to Google News.
Grouping them in clusters lets you see the best posts on a story or get a variety of perspectives. When you look within a cluster, you'll find a collection of the most interesting and recent posts on the topic, along with a timeline graph that shows you how the story is gaining momentum in the blogosphere.
In this example, the green "64 blogs" link takes you inside the cluster and shows you all the blog posts for a story.
“Blog Search uses a set of algorithms to try to determine the most popular stories in the blogosphere. We consider factors such as a blog's title and content, as well as its popularity throughout the rest of the blogging community. Then we display groups of posts that are closely related,” explains the FAQ.
“So I view the sites as very different. I love Techmeme and will keep going there every day, but I plan to make the Blogsearch home page a regular stop now as well. Every discovery site from Techmeme to FriendFeed to StumbleUpon to freshnews to Alltop to popurls to Technorati gives you a different lens to discover new things on the web. I think it’s nice to have another site that highlights interesting things.
Discovery is different than search, but they’re definitely related, says Matt Cutts.”