Well, now bownie has signed up and I believe becomes the first Advogato user that I've ever actually met. (If you have a counterexample, drop me a line.)
forrest: I was going to do a Chinese flashcard thing in Javascript once upon a time, but I didn't get very far. I have a toy that pops up the definitions of characters from big5 input, using Javascript and CEDICT's dictionary file. It's a slightly useful-ish tool. The source is up there, but it's a complete mess -- very much a coffee-breaks-and-weekends project of a couple of years back. And the popup things don't work in Mozilla, something I've never got around to fixing. So, I'd be interested to see anything you come up with.