Has your email address been compromised?

If it has, there is a new online servie called Pwnedlist that will try to tell you.  To see if your email address  or username is in the service's nearly 5 million name database, simply type in your information and click, Check.  Pwnedlist will then deliver the good or bad news to you.  If you do show up in the database, don't panic, it does not necessarily mean that someone has been in your account or tried to break in, but still, you probably should change your password.