USA

Information
http://www.infoplease.com/states.html
http://www.50states.com
http://www.globalcomputing.com/states.html
http://phil.mav.net/tourism.html

Quizzes
http://www.lizardpoint.com/fun/geoquiz/usaquiz.html   
http://www.funbrain.com/where/
Capitals
http://www.scottforesman.com/resources/statescapitals/
http://www.what-is-the-capital-of.com/state-capitals/50-state-names-4.html
http://kidshub.org/kids/capitals.cfm
http://www.infoplease.com/spot/quiz/stcaps1/1.html
facts:
http://www.infoplease.com/spot/quiz/states4/1.html
http://www.infoplease.com/spot/quiz/states1/1.html
http://www.factmonster.com/spot/quiz/states1/1.html

Other resources
http://www.howard.k12.md.us/lisbon/states.html
http://www.kn.pacbell.com/wired/fil/pages/listthe50sju.html
http://members.aol.com/bowermanb/USgames.html