I ran across Wordle today, a pretty neat concept. It reads in an RSS feed and creates a word-cloud of all the words in it. Here's one for this blog:
The cool thing about it is how easy it is to create one of these. Just paste in a URL and click the button. Bamn, you got something to start with. No login, no signup. You can tweak some settings after that if you like. And you can save it just as easily.