A good wrapping job can make an otherwise bland gift seem extra special. Google knows that. Staid-looking Gmail now has the ability to change the visual theme of its interface, wrapping your email in everything from a simple "Sunset" color scheme, to one featuring ninjas. The choices are somewhat limited—for example, there’s no holiday theme for the season—but considering how much time one can spend on email, it's nice to be able to change the scenery every once in a while.