Here's the problem with a "blog" search engine: how do you decide what's a blog or not?
Here's a Not A Blog: http://www.webanalyticsassociation.org/en/dir/?66
And that's the first result on a search for "innuity" in Technorati today.
So it's bad news for blog search engines and good news for anybody who wants to really spam a blog search engine with tons of directory entries or other lame content that hurts the Internet overall.
And that's bad news for anybody who wanted to do a Master's thesis on blog posts. And good news for anybody who wants to... make it hard for people to do Master's theses on blog posts...
And the toppings contain potassium benzoate.