What impressed me?
1. The presentation itself. The metaphors and images work really well. Beats a powerpoint anyday. Learning stuff can be fun. To all those folks in marketing departments in enterprise software companies: Watch this. Can you explain your products as simply, coherently and with this sort of pizzazz? If not, why not?
2. The distribution method. The authors, Lee and Sachi LeFever, posted it on their website here and also on youtube and blip.tv. On youtube it has already been viewed 7,000 + times. And it was only posted 5 days ago. They also produced the video RSS in plain English. 80,000 + views.