http://news.com.com/Microsoft+shows+off+improved+search/2100-1032_3-6102892.html?tag=cd.top

"Most search engines today use a somewhat two-dimensional approach, matching user queries with the content and link structure of Web pages to return a list of results. We're looking at how to add a third dimension--the users themselves--to improve the search experience," said Eugene Agichtein, a researcher in the Mining, Search and Navigation Group within Microsoft Research.