While I knew the stuff discussed in this particular article, I have to say Keynote is probably one of my favorite apps on the mac, and far more powerful than you'd first come to think...

After getting back from WWDC, I've been so inspired from the presentations, that I've found myself just making and perfecting presentations in Keynote. Presentations that I'm not even sure I'll ever hold.

I can still stumble upon great new features, just by accident. (Just learned a whole lot, just by bumping into the "Help"-button during a presentation, for instance...)