if you are a Blogger user (or simply a reader, for that matter) Dynamic Views are the latest & coolest by Google. Type "view" at the end of my blog url so it reads like this http://whitespaceisgood.blogspot.com/view and play away! (well, you might want to watch the video below first to get a peak at what it can do and then go play). Works with any blog powered by Blogger. Cool.