Repeat after me: "Reusing passwords is BAD!"
a hacker group going by the name of Gnosis compromised the Gawker Media network (made up of popular websites such as Lifehacker, Gizmodo, Jezebel, io9, Jalopnik, Kotaku, Deadspin, Fleshbot, and Gawker itself) and liberated not only the source code for the site, but also the entire user database consisting of about 1.3 million usernames, email addresses, and password hashes. In an ideal world, this wouldn't be a problem, but we don't live in an ideal world, but this is far from an ideal world, so it has the scope to be a pretty big deal.