Sometimes it is surprising to see a new search engine enter the market, considering the current market space. Three search engines account for over 90% of the referrals, while another dozen or so account for about 7%. So when a new one comes out, it is worth telling you about.
Vivisimo has been a company we have been watching for some time, ever since they announced that they were working on their own search. In fact, they were more or less a meta search engine for quite a while.
Then they announced a new type of search - a clustering search engine. In general terms, what they do is find results for your query within clusters, or groups of results.