Wordle is free web service that let you generate “word clouds” from text that you provide. You can enter your site /blog keywords, or enter a URL of any blog, blog feed, or any other web page that has an Atom or RSS feed, or del.icio.us user name to see their tags. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes.

The images you create with Wordle are yours to use however you like. You can print them out on T-Shirts, business cards, brochures, or save them to the Wordle gallery to share with your friends, or embedd in your website or blogs.

More info: Wordle