I'm sure that I'm late to the party on this site.. but I just tried using it and I'm giggling like a little kid at all the possibilities. This site is cool because it allows you to create a mind map about a topic and then run through it like a PowerPoint. You can add graphics and video. And the best part of all is that its free for educators and students!
I can see lots of different applications for this ~ end of the unit project, KWL, introducing a topic, and having students create one as a summary project. I'm going to try to get my AVID students to do one for presenting their book reports.
I worked up one here for fun.... http://prezi.com/lfcprjpjkbzy/ You can navigate through it by clicking on the "play" button at the bottom of the frame.
So... just a little something to play with. I can see it being really fun on a smart board!