Check the award-winning Search Engine Showdown . It has a comparison chart, analysis, statistics, and reviews. PC Magazine published rankings, reviews and analysis of 20 search engines in November 2000. You might also try picking one you like and comparing it to others yourself. Only you know what features matter most to you.
Search engines seem to change all the time.
One of the best source for information on changes is Search Engine Watch . You can also check the news section of Search Engine Showdown. Other good sources include Web Savvy , WebSearch and Research Buzz . It downloads a client that actively monitors web pages of your choice and highlights all changed material. Also try SearchEdu , an engine that always limits results to that domain.