Traditional presentations are very linear, which is great if that is how you think. I am all over the place during my brainstorming sessions. So I need a tool that can allow me to put as much material on the screen as possible and then me link to it the way I want to interact with it.
Enter Prezi: a slick, almost addictive paradigm in presentation creation and display. You can control the size and layout of all your pieces as well as how the story plays out. For the non-linear thinker in all of us (I'm looking at you, mind mappers of the world), you should DEFINITELY try this out.