Feed me
View your favorite RSS feeds right in Gmail as “Clips” along the top of your Gmail screen. Display clips from blogs, news sites and other online sources. Pick from the latest headlines, random popular feeds, or add any RSS/Atom feed you want. Learn more

See it now
Don’t want to wait for an attachment to download? Now when you get Microsoft Office, OpenOffice or .pdf attachments, you can view them as a web page in HTML by clicking the “View as HTML” link right next to it. For when you’re on a mobile device or you don’t want to install some new software just to view a document. Or if you just want to see it faster. Learn more

Shortcuts on the right
Now Gmail automatically detects addresses and tracking numbers, and displays useful information for them alongside your messages. With a single click, you can get directions to that address your friend sent you, or find out when the new book you ordered will arrive. Pretty handy! Learn more

三个功能分别是：

Feed me，也就是Feed订阅，很早以前就开始内部测试了，现在终于像所有用户开放了。

See it now，增加了把Office和PDF文件直接转换为html格式的功能，Google进军Office的第一步？

Shortcuts on the right，和Google Maps相结合的一个功能，可惜国内用户又暂时享受不了了。