With all the frustration over performance issues with Technorati and relevance in results from some of the other blog search engines, Google Blog Search is a much anticipated feature. You can get to Google's Blog Search from Google or Blogger: google.com/blogsearch or search.blogger.com

Lots of coverage on this already today:
John Battelle (last night)
Search Engine Watch
Inside Google
Ask Dave Taylor - has inside info that Yahoo blog search is coming soon

Recently MSN started supporting search operators (feed: and hasfeed:) that allow you to search for feeds or web sites that include feeds. (details from Robin Good) You can also search for blogs using MSN's Start.com.

Tags: Google, Google Blog Search, blog search engine