At Microsoft there are three kinds of powerpoint slide decks one typically finds:
Most of my decks are done in the "technical note style". But recently I'm preparing for a demo, so I've been playing with the more graphically-intensive styles. I'll be posting examples of my work so that you can see some of the advanced features in PowerPoint. Also, if you like the examples please feel fee to use them in your own decks.
Here are my samples from my first deck: msdn-saveenr-powerpoint-hotness-part-1-2007-06-18.pptx