On the same day that LinkedIn discovered that about six million of its passwords were cracked and distributed online, dating website eHarmony announced that it was also the victim of a similar attack. A post on the company's blog says that a small fraction of its passwords were compromised — about 1.5 million according to Ars Technica. The list, which was found on the same website as the LinkedIn passwords, contained about 400 passwords that were either "eharmony" or "harmony," which both ties the list to the dating site and also reveals that some people aren't very creative.
EHarmony automatically reset the passwords of all the affected customers and emailed them instructions to update their passwords themselves. The passwords are tied to individual user names, but it wouldn't hurt to change your password anyway.