[dzgimtpk] Abstract distributed social networking

Create distributed social networking software which relies generically on two external utilities: sending a message to an address of a format understood by the sending utility (but opaque to the caller of the sending utility, i.e., the social networking client software), and a way of accessing a queue of received messages.

Obviously email is one well developed such protocol.  HTTP PUT and GET is another.  The social networking software should work with any and all of them, including those not invented yet: it should be agnostic about the underlying messaging system.

In a way, this seems easy.