Business Success Using You Tube

I'm fascinated by the growing list of organizations successfully using You Tube for a new kind of PR. Heard of the tie up between Diet Coke and Mentos, the Sony Bravia phenomenon or the Will it Blend? craze? If not, look them up on You Tube, you'll find these companies have secured millions of dollars worth of free publicity for the corporations behind them. Well, I say behind them, it usually starts by accident. Someone posts something that is fun to watch, it just happens to have your brand in it and if you're lucky, it spreads.