Several updates were made to the Gmail app for iOS, including –
-Ability to set a custom signature when sending from mobile devices
-Access to configure and set up a vacation responder
-Improved labels with support for nested labels
-New notification sound on iOS 5 to better distinguish received mail
-E-mail messages can now be sent as drawings with support for different colors, brush sizes, lines, erasers, and spray paint
How to access what’s new:
-To configure your custom signature or vacation responder, open the Gmail app, select Menu and then the gear icon.
-To draw a new message, compose a new message and select the scribble icon. The new drawing will send as a PNG file attached to the message.