We picked up the desktop version of this to play around with at the office. I think most of us have given it fairly high reviews.
At any rate, there are several posts about it on a collaborative blog that a group of us in computing maintain. Feel free to check it out at http://computing.allegheny.edu/blogs/technocool.
Perhaps this is a better example of how powerful simple multimedia is and that users with a sound understanding of a concept can produce media that conveys that understanding and incites heated discussion (teachable moments).
I think I will tag it in del.icio.us so this video and the conversation it generated can be used when we run our next workshop on video in education.