...you've gotta go...
"I work in the world's largest medical center, and what you see here every day is people showing up in ambulances who didn't expect that just five minutes earlier."*
"If you suddenly die or go into a coma, there can be a lot of things that are only in your head in terms of where things are stored, where your passwords are."
He set up a site called Deathswitch, where people can set up e-mails that will be sent out automatically if they don't check in at intervals they specify, like once a week. For $20 per year, members can create up to 30 e-mails with attachments like video files.