We knew that the pre-loadable Left 4 Dead 2 demo on Steam would send withering waves of madness through the world's populace, but we never considered what would happen if the demo failed to materialize on the promised date. Steam users have been reporting that the demo is still unavailable, and Steam's own events page -- pictured above -- notes that it won't be available until early tomorrow.

The delay seems to only affect Steam users at the moment, as the Xbox version of the demo is currently available on Xbox Live Marketplace for those that have the redemption code. We've contacted Valve regarding the delay and will update this post as soon as we have more information.

Read more at Joystiq