Check out this interview with DoubleTree Hotels global head John Greenleaf about how DoubleTree is using contests and sharing around photos and videos uploaded by their customers, tied to specific locations.

Motorola hit a home run with their Megan Fox Super Bowl ad promoting their Blur social networking capabilities on Motorola phone. The ad achieves its purpose which is to get people to talk about MOTOBLUR capabilities, and the notion of sharing a picture of Megan Fox in a bathtub that she took with her camera phone definitely drives that point home!