Fredrik Strang is going back to K2 in 2012. He has been putting some videos of his training on YouTube. It has been reported on Wikipedia that he is going for scientific research. The research will involve decision making at high altitude.
Strang was on K2 in 2008 when there were a number of deaths on the mountain. He was one of the climbers who turned back at 8000m before the bottleneck. His decision making then made sure of his survival.