Apparently someone hacked into The Pirate bay using an exploit in their blog software and have stolen their entire user database. Thankfully the data is encrypted, but TPB are still urging users to change their credentials. From the site:

Hi, we have some sad news, but don't be alarmed...Some people (and yes, we know who) found a security hole on our web site (in fact, actually in this blog).

They have got a copy of the user database. That is, your username and passwords. But, the passwords are stored encrypted, so it's not a big deal, but it's still very sad that it's out there. All e-mails are for instance encrypted as well, they will most likely not be able to decrypt them either (they are _very_ encrypted).

We encourage all our users to change passwords as soon as possible - and if you have the same password on the bay as other places, you should update them as well.