Unfortunately, this means that many of Twitter's userbase are now in the hands of the hackers, who may use or sell the information to their own ends. So what can you do? Well, the answer is simple, and Twitter staff was quick to suggest it: change your password, whether or not you received the e-mail notification sent out to potential targets. It's just good practice.Here's a copy of the e-mail sent out from Twitter about the hacking: