These guys recently posted a great roundtable discussion about the "future of digital video" and with in minutes of the beginning of the seminar the topic of Canon HDSLR's came up. There is a great run down of how/when/if HDSLR's are appropriate. The panel includes Christina Fox, a visitor of this site and Larry Frame the instructor dude.
Anyway, there was no embed code but if you think you want to buy a HDSLR you should watch this seminar online.