Very interesting search idea.
Clusty is the search site owned and operated by Vivisimo that aims to change the way people search online. It uses our award-winning Clustering Engine to organize search results into folders grouping similar items together. Thus a search for ‘pearl’ organizes the top 250-500 results into subject folders such as Jewelry, Pearl Harbor, Pearl Jam, Steinbeck Novel and Daniel Pearl. Clusty allows users to focus on the area of interest without all the chaff.