[ImSkeptical]

That's why you need to keep it on some kind of cloud storage drive arranging an annuity or trust to keep paying the bills. Then, you have a script on a cloud server that posts on Craigslist once a year or month, hiring someone to duplicate your setup on a new cloud provider, opening a port for one of your existing nodes to connect to and verify, and also ask that person to modify the reproduction script of the clone, so that it will post on a Craigslist equivalent but not Craigslist. You'd also need some logic so that the rate you add clones is limited to the rate at which your fund to pay for the clones increases.

[richdougherty]

Someone needs to write an Ethereum contract for data archiving! Pay for storage based on market rates, regularly verify integrity with hashes, etc.

[Frondo]

Haha, a never-ending hell for the kids you leave behind when you die. Love it. It should email them monthly messages, too. "Your dead parents data is STILL SAFE."

[ImSkeptical]

I'd include in that email an estimate of how much money has been spent on the preservation campaign so far.

"If your ancestor hadn't decided to dedicate X dollars (inflation adjusted Y dollars for current year) to this project you would have inherited calculateInheritant(tauntEmailRecipient, currentYear, familyTree, preferredCurrencyDenomination). PS - please reply to this email with contact information for any new descendants. If email is going out of style as a communication protocol, please reply with a program that, when executed, will take from standard in a filename that contains a message, and as a second parameter a contact address. Attached to this email you'll find a project spec describing this program more rigorously.