I’m scheduled to do a presentation with people thousands of miles away. They’re Mac users, so I was hoping that I could use iChat. I want to show them a Keynote presentation, but I’d also like them to see me via my MacBook’s iSight camera. Is there a way to do this?
Soren Peterson

Launch iChat, locate the person you’d like to chat with in the Buddy list, and click on the Video icon next to their name. After they’ve accepted your video-chat invitation and you can see each other, choose File > Share A File With iChat Theater. In the Share With iChat Theater window that appears, navigate to your Keynote presentation and click the Share button.

Your iChat window will now display the first slide of your Keynote presentation. In the bottom left corner, you’ll see the image from your buddy’s camera. On their end, they’ll see a similar arrangement, but your camera’s image will appear in their window.

A Keynote window called Playing Slideshow: nameofpresentation will also appear on your Mac. It contains the presentation’s navigation controls. When you’re finished with your presentation, just click the Close button and your iChat window will return to its usual picture-in-picture view.