And no, by "fun with java" I don't mean drinking coffee until you're twitchy and wierd and can't put a sentence together properly. Though that is fun.
These are a few cool java scripts by various people. Come on, dive in- if you're on my page, you probably have nothing better to do anyway.
French-English Translator
"Will I manage to buy a genuine Parisian after eating 300 croissants?"