Gmail now has a setup gadget to help people new to Gmail get started. This gadget is customized for Google Apps and helps people set up their Gmail account with actions like adding a profile picture and creating an email signature, and teaches them to use features like undo send and creating an auto-responder.
The setup gadget is hidden once the person completes all actions, dismisses the gadget or after two weeks. It can be relaunched from Settings.
Release track:
Rapid release (rolled out gradually over the next week), with Scheduled release coming two weeks later
For more information: