Matt discovered a really cool tool for non-linear presentations called Prezi. Students can get a decent (free) account by signing up with their .edu address.
The presentation is best viewed in full screen mode. I had some problems viewing fullscreen in the embedded version below, so I included the link above which may work better.
Use your left and right arrow buttons (keyboard or on-screen) to navigate through the presentation as I've set it up, but also feel free to use the zoom tool and your mouse to move around the presentation freely and take a closer look at personal notes that I didn't highlight in the presentation.
Was actually pretty fun to make. Props to Matt for the find.