Autopilot is the latest Gmail Labs product and it’s a doozy. If you are innundated with e-mail, and need some more efficient way to deal with it, including replying, then consider Autopilot.
Simply set some settings like Brevity, and Capitalization and let Autopilot write those e-mails for you. Autopilot looks at your past history to get a feel for your writing style.
Oh, one more thing – April Fool’s!