Google on 14th Sep Launched its full-blown Blog and Feed Search Service- Blog Search. SRPs pulled will be from blogs hosted on its own service Blogger.com (purchased from Pyra Labs few years ago) as well as hosted on other blog sites.

Blogger.com specific search tool can be found here http://search.blogger.com.

Blog search indexes a blog by their site feeds. The process of blog indexing started in june, any blog post older then june 2005 will NOT be included in the search. Google is continuously improving its current search technology to rectify this problem to index older posts as well. This way older posts will also be pulled up in search results.

While some standard search operators (link, site, intitle etc) specific to Google search engine are supported, there are various NEW Blog Search operators as well. Some of them are:

inblogtitle: (search by blog title)
inposttitle: (search by post title )
inpostauthor: (search for posts by a particular Author)
blogurl: (limit search to a URLs)

A search if he wishes, can also limit a SERPs by date — either a particular set of dates or a time span (last 12 hrs, last 24 hrs etc.)

Blog search seems to have a ten-word query limit, unlike the regular Google Web search.

The latest service of Blog Search from Google goes on to prove that Blogs are here to stay and there are movements on parts on other Search engines, some subterranean and some obvious to become the leader. All leading Search engines have been nurturing this idea of offering Blogs and Feed search services but Google seems to march on their path well ahead of time.