Don't some heli-operators already use the Avalanche Airbag Pack? http://www.abssystem.com/ They seem to be growing in popularity in Yurp. More oriented towards "offpiste"/sidecountry/daytrip BC skiing mostly, and $$, but the numbers look good...
I have an avalung, beacon, etc. I don't expect them to provide more than a marginal/modest increase in my avalanche survivability percentage; avoidance is a better plan.