Brain Pickings just built a typographic visualization using Wordle based on the title text from the various TED talks. If you don't know about TED already then be sure to check it out. They provide 'riveting talks by remarkable people, free to the world' and it's some of my favourite content on the web.
Brain Pickings used the title text from this spreadsheet to generate their cloud. I've taken both the title and summary text to produce my own shaped word cloud based on their logo. Click on a word to see the related talks, pick one and then watch it !