I'm not sure if this has been posted here before, but I thought it might be of interest to some of you.
"SOUTH will be the first return journey to the South Pole on foot, and the longest unsupported (human-powered) polar journey in history.
The culmination of more than four years' training and preparation, and the input of experts in fields as diverse as satellite communications to the manufacture of carbon composites and next-generation solar fabrics, SOUTH is not a throwback to the Elizabethan age of exploration, it is a statement about what we are collectively capable of achieving. SOUTH encapsulates the drive to push the boundaries of human capability and break new ground for others to follow.
[...]In 2006, 1,800 miles of the expedition were offered for 'sale'. Our founder sponsors are listed below, and we are indebted to all who have contributed. Unclaimed miles are still for sale, and you can buy one for a minimum donation of $100."