Nearly two and a half years after Google purchased Pyra Labs, the internet media company has finally delivered on its promise of a blog search serviceBecoming the first major search engine to offer blog search capabilities, Google's special search engine will allow Internet users the opportunity to search blogs without having to examine the full internet. The feature is set to search every blog that currently publishes a site feed.Two early drawbacks have been noted by the tech specialists. First, the site only lists posts published from June 2005 to present (though current numbers put the Internet at 17 million blog sites). Second, Google Blog doesn't perform true full-text search across all blog sources because the engine can only search those published materials that are syndicate excerpts of a specific site's blogging content.Defining blogs as sites that use RSS and other structured feeds, Google Blog Search is available in English as well as Brazilian, Portuguese, Dutch, French, German, Italian, Korean, Russian, and Spanish. The company promises additional languages.Google is the first major internet company to launch a search engine to address the blogging community entries that have been doubling nearly every five months. Google's new service is available both at www.google.com/blogsearch and http://search.blogger.com.All of Google's standard search operators are available on the new feature, along with inblogtitle:, inposttitle:, inpostauthor: and blogurl:.