L4D news

The "Crash Course" DLC will be available on September 29. From Steam News:

Crash Course delivers new single-player, multiplayer and co-operative gameplay to both platforms, and bridges the gap between the end of the "No Mercy" campaign and the beginning of "Death Toll" in the original game.

While containing both Survival maps and a Co-operative Campaign, the primary goal of Crash Course is to deliver a complete Versus mode experience in just 30 minutes, resulting in a streamlined version of the game's existing Versus campaigns. A recharge timer for infected teammates has also been added, and item spawn behavior has changed for more balanced gameplay.

A demo for L4D2 will hit the 'net on October 27. Says Joystiq.com:

Speaking about upcoming co-op zombie shooter Left 4 Dead 2 at EA's Tokyo press conference today, Valve's Kim Swift announced intentions to release a demo on October 27. Though no platforms were explicitly mentioned, we're betting pre-orders on both Xbox 360 and PC platforms will be getting first dibs, as Valve has already stated.

From what we understand, the demo will feature multiplayer, though we're not sure to what capacity this will extend. Either way, Xbox 360 and PC owners will get a chance to try out at least some of the 10 melee weapons well before the game's November 17 release. We'll ask EA for more details on the demo as the Tokyo Game Show continues this week.