Bitly, the URL shortening service, has been the victim of a hack. CEO Mark Josephson posted an \Urgent Security Update\ on the Bitly blog today, stating that they found reason to believe that user data had been compromised. The data that became vulnerable includes email addresses, encrypted passwords, API keys, and OAuth tokens. They didnt provide much more information about the hack beyond that. To secure their systems, Bitly has disconnected user accounts from Facebook and Twitter accounts.