Hm, looks like HN maybe sent too much load their way -- the service is not working for me now that this submission has made it to the front page. Too bad, I would be interested to hear people's take on this.<p>The idea is to return a set of clusters of search results -- so for example the phrase "Mickey" would return grouped results for "Mickey Mouse", "Mickey Mantle", "Mickey Rourke", etc. It was doing a pretty good job when I played with it earlier.<p>Here is the about page, with a link to details of the clustering method: <a href="http://arc2.cc.gatech.edu/about.html" rel="nofollow">http://arc2.cc.gatech.edu/about.html</a>