Wordle.net
American Whitewater's Mission as a "Word Cloud"
Build your own “Word Clouds” by pasting any amount of text into Wordle.net You can also adjust the layout and colors. The site is also a powerful tool for the classroom, for self-editing, and for scrutinizing other people’s statements of philosophy. The more times a word occurs in a particular block of text, the larger it appears in the cloud. The site has recently caught on in a BIG way — word clouds have even appeared as headings for articles on CNN.com.
Warning: This is an addictive activity!