The Future of Search
You may have just become accustomed to the idea of Search 3.0, but get prepped for search's latest evolution -- and it's more socially powered and human influenced than ever before.

Danny Sullivan recaps the growth of algorithmic search from strictly on-page factors (Search 1.0), to off-page factors like links (Search 2.0), to blended or Universal Search (Search 3.0) and arrives at this new age of Mahalos, Eureksters, Twitters and personalized search.

Search 4.0 is a human/computer-powered hybrid, where the algorithms deliver results quickly, but the people make sure that they're relevant (either for themselves or others). - Read the whole story...

http://futureofsearch.federatedmedia.net/archives/15#more-15