A post by id Software's Peter Sokal on the Wolfenstein Forums reveals a multiplayer build of Wolfenstein has been leaked (thanks Voodoo Extreme). On a semi-related note, a new trailer that puts the "castle" back in Wolfenstein can now be found on AtomicGamer and Gamer's Hell. Back to the leak, the id Community Manager outlines the consequences of dallying with the contraband version of the supernatural shooter revival:

It was brought to our attention on Friday, 7/31 that a build of the Wolfenstein Multiplayer was leaked and is now being distributed illegally through breach of NDA and mirrors posted on the internet. I must warn anyone involved that Activision’s legal department is taking this matter very seriously.

Same applies here on the forums. If you mention that you have acquired this build, you are openly admitting to illegally obtaining the build and will be banned straight away. You have been warned.

With regards to any footage, screenshots and comments posted here and all over the internet, an important thing to keep in mind is that these were not created from a build of the game that was final or consumer ready. There’s nothing we can do about it now except continue working on the game.

Wolfenstein has been designed to retain elements that are the core of the Wolfenstein multiplayer experience, such as distinct classes and objective-based teamplay. We are also introducing new elements to the game with the Veil powers and persistent upgrades. After release we’ll make our SDK available, as well as release updates to address feedback from the competitive community.

We look forward to seeing you online upon release.