The biggest US e-mail advertising company has been hacked- their clients include most US credit card companies and nearly every major website, including Amazon.
Given the Epsilon breach, be very mindful of what we call "phishing attacks"- attempts to get you to take an action online via an e-mail.
Legitimate companies never collect private or account information from you via email. Given what I know about this breach and the next generation of attacks, I recommend NOT clicking links in legit-seeming email as well. If you have business to do or want to follow a link from an e-mail, open a window and type it in manually. Rally.
Avoid the shortcuts in email you may receive as though they may LOOK legitimate, it is easy to fake those.
http://www.securityweek.com/massive-breach-epsilon-compromises-customer-lists-major-brands Please take this seriously- it is going to be a nasty year in personal computer security.