I think videoblogging has been done and done, different concepts, different ideas, several iterations, none have truly taken off. The points made already about people not being as open to it are valid, and even if/when you get past that barrier, you then have to start turning the users/readers. The nice thing about ~reading~ blogs is that you can bookmark, switch to another tab, highlight portions, and even email complete entries, all from the relative silence of your office cubicle.
