The response to my first entry into the SlideShare.net "World’s Best Presentation Contest‘ has been very good. There are a lot of great presentations in this contest (and quite a few bad ones as well).
I found several great presentations on presentation design. Here is an excellent presentation on "Presenting with Text".
This presentation does a fantastic job of demonstrating how you can use text and the many font choices within PowerPoint and Keynote to deliver a much more dramatic presentation.