An idea: how to get rid of e-mail.

Blogging is like e-mail with access control. Post a blog entry that can be read
only by the people you intend to read using access control. Ping them. They use
WebID to authenticate and can read it, copying the entry over to their store.

Result: secure e-mail that arrives in a couple of connections at its
destination.

Next: write a pop/smtp proxy, so that people can use their current e-mail
clients to do their work.