Stumbleupon is a powerful community tool to organize preferences of Web sites around personal and group interests. (I am pleased to say that a lot of folks stumbleupon Beet.TV, which I know from reviewing my traffic logs -- and that's great!) It's been growing and now there are some 1.6 million registered "stumblers." Earlier this week, the company introduced a way for users to rate and organize videos from YouTube according to specific interests -- arts, sports and others. I spoke with founder Garrett Camp in his San Francisco office about the new service. He explains the new tool and provides a demo. Making video searchable through community preferences is a great idea. There is so much to sift through out there. Another start-up, Dabble, is using peer preferences to organize specific interest videos. See this video on Beet.TV: http://www.beet.tv/2006/12/stumpbleupon_no.html Less