I may be a little late coming to this party, but Google has introduced Google Blog Search, which limits searches to just blogs (well, in theory, anyhow). The most interesting thing about this, to me, is that GBS provides the search results for your terms as Atom and RSS feeds.
It seems that Google is leveraging blog feeds to get structured data, and monitoring ping sites for timely updates. This is something that lots of people speculated about way back before Google bought Blogger. RSS/Atom feeds from blogs are such a rich source of structured information, it only makes sense that a “mainstream” search engine should take advantage of it. I can only wonder what took them so long?
The next feature I’m looking for: “Search within X miles of location Y”, using geotagged blogs. This would be great for searching for information written by other bloggers in your vicinity.
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