Millions of passwords were stolen from the popular business social media site LinkedIn. If you have a LinkedIn account you should change your password immediately.
http://www.businessinsider.com/linkedin-hacked-2012-6
Update: It now appears that eHarmony passwords have also been stolen. Change your password there as well.
Update2: Among the growing list of hacked sites it has been discovered that Last.fm has also had passwords stolen. Log into your account there and change your password ASAP.
