http://www.blabberize.com/. The website itself is well worth a visit to be insulted by a sarcastic Alpaca, but it's fun (and relatively easy) to create your own blabbering picture. Or so they tell you. I've been trying to get through to do it myself but their website is apparently under attack from "TechCrunch":http://www.techcrunch.com/ readers who want to do the same thing I do. If anyone has any luck, let me know how it turns out.