Function: Notifies the site administrator that their site activation was successful.

Function: Notifies a user that their account activation has been successful.

Function: Gets the current network.

Function: Gets a user’s most recent post.

Function: Notifies the network admin that a new user has been activated.

Function: Checks whether a site name is already taken.

Function: Sends a confirmation request email to a user when they sign up for a new user account (without signing up for a site at the same time). The user account will not become active until the confirmation link is clicked.