You could electronically interact with other services, such as FaceBook or MySpace, where other older services couldn't. I like the idea that I can authorize s

You could electronically interact with other services, such as FaceBook or MySpace, where other older services couldn't. I like the idea that I can authorize somebody to change my facebook status to "Hugh is dead". It would be embarrassing if it were stuck for all eternity on, say, "Hugh is going skydiving". Realistically I think it'd be difficult to persuade people to give money to a brand new startup for a service which probably won't be delivered for decades. But maybe you can think of a way to do it, especially if you somehow tie yourself to some long-lived, trustworthy organization that people can be more confident will still exist in a century's time.