While doing research for that same paper (mentioned yesterday), I also found WEBoggle, an online version of Boggle. My favorite online game is Joggle, but... man, WEBoggle is very cool.

OK, you can't do challenges, or play solo, and it's a little exhausting because games start every three-and-a-half minutes, but the technology is so well done! The page never reloads! They use XMLHttpRequest for all communication with the server. Every time you enter a word, it immediately asks the server if the word is legal or not, and scores it. The board is reloaded, the game is scored. All without reloading the page!

Very cool. Too bad there wasn't room for it in the paper (which, btw, I finished on time).