Jon Udell just put up a screencast of Wikipedia Animate – one of the competing projects in the Animate Wikipedia competition.
I also created a submission for the contest, and submitted, but perhaps too late (as the first two entries received the most recognition, and a winner still has yet to be announced). My entry has a lot more features, albeit much more buggy. A lot of the technology that I created for my entry has been borrowed by Dan’s entry (such as the Javascript Diff Algorithm and my use of Sparkline-like sliders). I have a number of other features in my submission, and if you’re interested in playing with it you can check it out here: AniWiki. Hopefully a winner will be announced soon, I’ll be sure to let everyone know when that happens.