randomwisdom.com

http://www.flashcomguru.com/apps/letters/

At first click, you'll wonder exactly what is going on here. But once you scroll down and see "You are dragging against 133 users" you realize it's like a big social experiment. The massive entropy of the whole thing tends to break apart any words that are under formation, and it's impossible to spell something of your own without having the words fly out from under you; you then realize that other people are stealing your letters, hoarding them in a corner, matching them by color, or just throwing them around chaotically. When I last left, some folks were trying to spell Massachusetts. Impossible.