Wordle is my new favorite way to waste time. You can enter your favorite string of words to create a pretty word cloud. You can also enter the URL of your website or blog, and it will pull words from your site to create a word cloud. It can also create a word cloud using your del.icio.us tags. Click randomize to get all kinds of different colors, fonts, and layouts.
Here are a couple of the clouds I created by entering The Well-Read Child's URL.