Prezi. I have probably mentioned it over a dozen times on this blog. I don't see it as a savior for presentation tools, just as an alternative for PowerPoint. Remember though, it is not about the tool it is about the tool user.
Prezi took a step for its users by making Prezi available for iPad. I recently got an iPad for work and am thoroughly enjoying using it. I have been struggling for ways to use it though, and the creation of a Prezi App helped me to discover a new way. You can learn more about the Prezi App in the iTunes store. To see it in action check out the video below.