lifehacker.com/hundreds-of-dropbox-passwords-leaked-change-yours-now-1645982533

Change those Dropbox passwords and enable 2 factor authentication.

"Dropbox has not been hacked. These usernames and passwords were unfortunately stolen from other services and used in attempts to log in to Dropbox accounts. We'd previously detected these attacks and the vast majority of the passwords posted have been expired for some time now. All other remaining passwords have been expired as well." -Dropbox

Here's the "B" list of what was leaked already (400 out of apparently 7 million): http://pastebin.com/aRgTJzzg