Meta-search Engines 
Ever heard the expression, "Jack of all Trades and Master of None"? In general, Meta-search Engines try to be everything to all people, and so wind up being less useful than they look. We don't use these ourselves, but you're free to try them if you have some spare time on your hands...

Name/URL

Strengths

Comments

Ixquick

This one receives high ratings.  Supports many types of advanced searching.

Brings the "best 10" from each engine and gathers the results for you.

Dogpile

Dogpile receives higher ratings when customized. (see comments). Like other meta-search engines, it will search several at one time.

Can be very inconsistent in its findings.  For best use click on "change search order" and have it search Google, Infoseek, and AltaVista first. 

Redesearch

Very simple to use.

Allows you to search AltaVista, Yahoo, Lycos, HotBot, Infoseek, Snap, AOL Net Find, and Goto.