Public Peers, aka "Pubs"

To sync across the Internet, "Pub" nodes run at public IPs and follow users. They are essentially mail-bots which improve uptime and availability.

The Scuttlebot community runs some Pubs, and anybody can create and introduce their own.

Invite tokens

Tokens which may be used to command specific Pub servers to follow a user. These are used to join Pubs.