Thanks for the clarification, it's hard not to ask a million questions... as all of us want to find the "how to keep this from happening to me" thing in this story.
How to keep this from happening to you:
1. read the avy report, in this case it was available at
www.avalanche.ca. If I recall correctly it was rated at HIGH (it was bouncing between considerable and extreme during that cycle) in the alpine (this happened at 1820m elevation which is right at or slightly above treeline according to the write-up on avalanche.ca). When it is rated at HIGH, and especially when combined with poor visibility, stay in the flat trees or find something else to do until things settle.
2. If you must go out, dont climb an open hill without someone (or more then one) watching from a safe zone. If a portion of the 12 people on this trip had been in a safe zone watching and been able to spot the point he was last seen so they could have mounted a fast beacon search he might have had a chance, especially based on the fact that it doesnt sound like he traveled too far with the slide.
3. Take a real avalanche course so you can learn to identify terrain with the potential to slide. Ridgeclimber, how many of the 12 people out there had taken at least an AST 1?
4. Read the signs Mother nature is putting in front of you. Here on the South Coast we had a cold dry windless spell in late Nov/early Dec. Perfect conditions for the formation of surface hoar. Then right around the holidays we got a whack of snow. Right around this time we had a crazy avy cycle with many runout zones being redefined.
5. Be willing to wait a couple days for things to settle. The mountains arent going anywhere.
6. Read Snow Sense by Jill Fredston and Doug Fesler. then read it again.
I know I may sound like an insensative jerk but I have sat right where Rideclimber is right now. See the Oct 2010 issue of Powder Magazine for a writeup on the avy death of my best friend.
Everyone is so eager to drop $1000 on a new airbag but it drives me nuts how few are willing to spend $350 and 3 days on a real avy course that is far and away more effective then any airbag.