Thanks to questionable security practices at Gawker Media (publishing parent of many high-profile websites including Gizmodo and Lifehacker), a number of people are busy scrambling to change their passwords on a lot of different sites today. Gawker stored encrypted passwords on its servers instead of password hashes (and stored those passwords using the deprecated DES standard), so as a result of some weekend hacking, a lot of email addresses and passwords were stolen.
Gawker Media is asking anyone who uses its comment system to change their password immediately, and if they used the same email address and password on other websites, they should change those