Presentation Zen points out a pair of great TED Talks. They are both very short and definitely worth watching. Garr also manages to point out, as good as they are, how both could have been improved with almost no effort. This is definitely a good read.
He recommends one presenter just use a remote. That’s always a good idea and it’s sad that he didn’t — given that he’s using an Apple laptop and Keynote responds to the standard remote packaged with every MacBook & MacBook Pro. It doesn’t give you the same freedom of movement that an RF remote would, but it works in a pinch. If you’re using OS X and still doing presentations in PowerPoint, it’s time you ditched it. I found the Keynote interface a little alien at first — probably from years of working with PowerPoint — but once I pushed through the initial disorientation I find I’m much more productive in Keynote. I manage to put presentations together more quickly, I can deliver a smoother presentation thanks to the Presenter Display and I always have my Apple remote handy.
I’d recommend that everyone visit the TED site and check out more of their prior speakers, too. You can also subscribe to them as a podcast at the iTunes Store.