Choo-choo choose one of these sites for a Springfield fix. Simpsontastic!
Good looking with episode summaries and all the basics on who's who.
The Simpsons @ BBCi
Frankly, better than the official site, with an impressive roster of quizzes, and plenty of accessories like wallpaper and quizzes, plus trivia and gags.
The Wisdom of Ralph Wiggum
Universally quotable, he gets a page to himself.