Here for your reading enjoyment, an article URL from ZDNET which says basically, "Surprise, the best web searching engines may be those powered by.... humans!" It gives an overview of some of the web searching engines & how they're powered as well. 

http://cgi.zdnet.com/slink?/adeska/adt0119ba/4365:5279215  





Kim Laird, Acquisitions, Documents, Serials Team Leader
Library of Michigan, PO Box 30007, 717 West Allegan Street, 
Lansing, MI 48909.  517-373-9438 (Fax)  517-373-5866 (TDD only)
[log in to unmask]  HOURS: 7:30a.m. - 4 p.m.