Matt Damon urges people "celebrate your can," because the water flushing in it is cleaner than what a billion people around the world are drinking
One "Super Smoothie" pouch will be donated to a hungry child for every movie ticket or download sold during opening weekend
Sean Penn's Cannes benefit for Haiti raises $2 million
Charities, employees benefit from comedian's plan to cut out middleman
Online charity auction features, props, costumes and a walk-on role
Matt Damon -- yeah, sure, he is a movie star ... technically ... but clearly he needed some exposure.