www.summitonthesummit.com
19,340ft Website. Very good example of using design for social cause and involving people into the cause.
The expedition was sponsored and supplied by Hewlett-Packard and Intel, who also provided the climbers with computer equipment. The documentary of the climb aired on MTV on March 14, 2010.
Reference:
http://en.wikipedia.org/wiki/Summit_on_the_Summit