Google products dont stop getting better. After giving some intuitive features like Labs, ever increasing storage, Google has made its users smile yet again.
Google has introduced 30 themes for its customers on 19th Nov. The release was gradually rolled out to all the customers in the next two days (I got the themes today 
)
Gmail users (me included) have long been using other ways to spice up their Gmail interface using third party addons, but now with this new addition, we wont have to do that.
Here is a screenshot of all the themes:
To see the themes and chose one for yourself, go to Settings–>Themes
From Gmail blog
December 17th, 2008 at 2:07 pm
After its search and advertising core businesses, one of Google’s hottest products is its Gmail service. One of the most widely used free email services on the internet; Google is constantly at work improving the service. Typically upgrades