Web frameworks and presentations

While evaluating some web frameworks (like ExtJS, YUI, Sproutcore and others) the framework "Cappuccino" just does things a bit more weird (or just call it revolutionary if you want): It tries to hide all the funny HTML, CSS and JS bits from you by requiring to learn a new language called Objective-J. Not really what I want.

However, there's a really neat and useful application that already uses the Cappuccino framework: 280 Slides

With this you easily can create Powerpoint-like presentations just in your web browser and present plus export the slides into PPTX format. Did I mention that 280 Slides is free? Now I did.