How we use your information.
Your first name and last initial may be published publicly as part of the petition to Congress. Your email address may be used to send you updates on SOPA/PIPA and other Internet policy initiatives. Your zip code is used to display the groundswell across the country and inform the appropriate members of Congress for your district and state. That’s it. Your personal information is in no way connected to any other Google services or Google account.
I'd sign up, but I don't believe this statement at all. Google is about as trustworthy as Facebook.