To the average blogger, Technorati, Google Blog Search, and Feedster are among the top three blog search engines. The following provides a more in-depth description of each of these.
Technorati--www.technorati.com
Technorati describes itself as the "authority of what's going on in the world of weblogs." This blog search engine tracks about 43.5 million web sites and 2.5 billion links. Technorati keeps a pulse on the world of weblogs in real-time manner, with continual updates of all the latest links and references.
Technorati tracks the number of links and hyperlinks through automatic notification, as soon as the blogs are updated. This means that thousands of updates each hour are occurring and being reproduced for ease of data retrieval by the user doing the searching. Technorati estimates that about 75,000 new blogs are being started every day and this combined with those of the previous blogs which are updated regularly, means that about 1.2 million new posts are produced every day which translates into about 50,000 blog updates for Technorati every hour.
Founded by Dave Sifry, and headquartered in San Franscisco, CA, Technorati uses and contributes to open source software and participates in a public developer's wiki to allow developers and contributors to work together. Technorati won the Best Technical Achievement and Best of Show awards for the SXSW 2006 and was nominated for a 2006 Webby award for Best Practices.
Google Blog Search--www.blogsearch.google.com
The blog search engine by the google team got its start on September 14, 2005 and pulls link results out of all blogs, not just the ones hosted by Blogger. Google Blog Search gives users the option of searching blogs in the languages of English, French, Italian, German, Spanish, Chinese, Korean, Japanese, and Brazilian Portuguese.
Google Blog Search operates in much the same way other blog search engines do, by allowing the user to simply type in the website, word, or phrase they want to see the results of and clicking "search." There are advanced searching options available in which you can get more specific with titles, authors, languages, etc. And they offer the option to display either the most recent results or the most relevant results which the ability to switch between these choices. In addition to this you can search a specific blog or even search within a specified date range. Google Blog Search also supports SafeSearch filtering to protect the user from coming across unseemly websites in their search.
Feedster--www.feedster.com
Feedster is a blog search engine which claims to have "the largest and richest archive of indexed feeds on the web" and provides links to millions of news, blog, and podcast sources.
Founded in March 2003 by Scott Johnson and merged with RSS-Search and
François Schiettecatte in June of that same year, Feedster was designed as another tool for searching weblogs, and also serves the purpose of indexing and archiving individual blog posts. Feedster supports both RSS and Atom feeds.
Feedster became popular quickly because it was able to index new information at a very fast pace and allowed the searchers to look for information chronologically.
Others--
Many of the websites listed in the previous section on the various blog search engines are gaining in their use and popularity and serve the purpose of a blog search engine very well. For further information on any of those, check out their websites and take some test runs. You may find different things you prefer from one of those.
Sources:
www.wikipedia.org
www.blogsearch.google.com
www.technorati.com
www.icerocket.com
www.feedster.com
www.liv.ac.uk
www.aripaparo.com