Search Engines other than google

So I was reading the newspaper on Monday and in the BIZ section they had this article on different types of search engines that are more powerful than google itself. They're quite awesome and I've only browsed a couple of them. This brings to mind all the various types of search algorithms and how data is sorted....(yes yes I know it's very geeky but being an engineering these things inherently interest me). I thought I'd post the various search engines that you might not be familiar with so that you too could try them. Give it a whirl...some of them are pretty cool =).

General Searches
http://www.kartoo.com/
http://vivisimo.com/
http://lii.org/
http://www.freepint.com/gary/direct.htm
http://www.dmoz.org/

Topic specific searches
http://www.scirus.com/srsapp/ (for scientific stuff)
http://www.yellopet.com/ (for pets and animal info)
http://www.woodcenter.net/ (anything about wood)
http://www.topix.net/ (general news)

try them out....you just might find them better than google =). I guess reading the newspaper everyday is useful =)....