Steam News has word of a new update for the Left 4 Dead 2 demo that's available the next time you log in to Steam, and a separate announcement says the Steam client has been updated with additional Left 4 Dead 2 support. There's also an update on the Left 4 Dead Blog clarifying exactly when the game will be available next week based on "an ongoing debate in the office and online as to whether '12 AM' means noon or midnight (for the record the answer is midnight). Word is:

When L4D2 will go live:

     • Tuesday, November 17th, 12:00 AM (midnight) Eastern Standard Time
     • Monday, November 16th, 9:00 PM Pacific Standard Time
     • Monday, November 16th, 10:00 PM Mountain Standard Time
     • Monday, November 16th, 11:00 PM Central Standard Time
     • Tuesday, November 17th, 12:00 AM (midnight) Eastern Standard Time
     • Tuesday, November 17th, 5:00 AM Greenwich Mean Time
     • Tuesday, November 17th, 8:00 AM Moscow Time
     • Tuesday, November 17th, 2:00 PM Japan Standard Time

Also, if you were interested in learning a bit more about the Survivors you'll be playing as this Tuesday(ish), check out our Survivor pages for Nick, Ellis, Coach and Rochelle with character, weapon and item details.