It's interesting that even though Blogger is owned by Google, Google does not have a blog search engine. If you want to use Google to search just blogs, you have to throw in some complicated filters. Even then, the results are extremely spotty.
From the Seattle Times:
"MSN said it would also offer MSN Blogbot, a tool for users to search Web logs. Known informally as "blogs," these online diaries cover topics from cocktail recipes to celebrity plastic surgery.
Google does not have a blog search service, even though last year it bought Blogger, one of the most well-known blogging software programs on the Internet."