Viridian is a group of artists, futurists, sf writers, and various net denizens who are concerned with global warming. We (yes, I am one) have contests.
The current contest is to design a truly Viridian robot dog. Win a Sony Robot Dog and get your idea pitched to futurist venture capitalists.
Yes, this does have something to do with global warming! The Viridian Repository has full contest details.