"Staff" is a group list - the only one we've got. Here's how to message us as a group.
1) Open your User Control Panel and select Private Messages tab.
2) Locate "Staff" in the upper right corner of the panel, highlight, and click "add"
This will add "Staff" as a group to the list of message recipients.
You can then add any others you wish to include by typing the name in the box and clicking "add".