I got an email saying the Ubuntu forum was hacked to the extent of exposing user email names and passwords. Since this forum also says "Vbulletin", I suppose the admins should get the details of that.
I don't know whether it's related but FICS (free internet chess server) has been attackd by hackers too on July 18th; the website is still down as of now.
And for Ubuntu forums, yes I did receive the email too.