So am I, actually, sorry. My initial thought was that a central authority (a host that might go down or bankrupt) could be avoided if I were to split my secret into parts, distribute them among my loved ones (telling them what it is about and that I trust them they'll not meet behind my back while I'm still alive), accompanied by instructions how it works. This way, there's no plain text of my super secret stored anywhere.
This solves the "my secret should be known by my peers when _something happens_"-issue. The "inform the others if something happens to me"-problem actually persists and for _this_ problem, a service like the one posted probably is a solution, sending out "the person has not been reachable for X days, please meet and uncover his secret"-mails to the peers.