Sounds like an interesting idea. But, like others, I am skeptical relying on a "beta labeled" web service to handle this for me.
I played around with this a while ago. Didn't think the way it's implemented solves the problem as I perceive it. (Plus, the risk of these confirmation emails ending up in spam felt a bit like a downer.)
That's for a bit further ahead, though.
I'm still a bit unsure about the part where "you're responsible for asserting that you're still alive." I'd like break it down to its basic premises and see if they actually make sense. :-)