I've been following the story (mainly on Ars) and things just seem to be snowballing, after the initial 10GB (compressed) leak we now have another 20GB or so of data, and its not just user profiles, apparently its emails, db passwords, source code, basically their whole business is wide open.
So, ignoring the moral side of the hack is this one of the biggest hacks jn recent memory?!
Oh, and I had to laugh at one of the sites allegedly offering to confirm if your email is in the data, after submitting (a made up) address and finding it clear it offers you the chance to tweet/share on facebook the message "I'm clear!"