Another follow-up story, but this one has some good news with the bad.

"Burnaby resident Carl Mulherin, 33, became separated from his snowmobiling companions Saturday while the group was on Top of the World glacier, north of Whistler.

A helicopter search team spotted Mulherin on the glacier Monday afternoon. He told rescuers he had dug himself an ice-cave that helped him avoid extreme cold and had enough food to survive the two days. Police said he did not require medical attention."

The story also has also details on the heli-skiing operation, which seems to do everything possible to mitigate the hazards of an inherently high-risk sport.

http://www.cbc.ca/canada/british-columbia/story/2010/03/22/bc-avalanche-deaths.html