Hi Joanne! This is an example of how (and where) to leave messages to people on the Wiki... just edit the "discussion" tab under their user page. This message is just to let you know that you have been made a Sysop/Administrator now, which gives you the ability to block users and to delete pages outright. You can sign messages using tildes, like ~~~~ leaves the following signature: "Eli 17:09, 10 April 2008 (PDT)".
Best, Eli 17:09, 10 April 2008 (PDT)