Left 4 Dead demo goes public tomorrow

Valve have just announced that the Left 4 Dead demo will be going public tomorrow, I strongly recommend grabbing it. I got to play two rounds at the Eurogamer Expo, and it was not enough time, I want more. It's a very exciting game, simply put it's like counter strike without the bullshit, plus Zombies.

Here's the best pre-order prices:
Left 4 Dead, PC - £19.97 delivered (undercutting Steam yet still giving the developer less of a cut)
Left 4 Dead, Xbox 360 - £29.97 delivered