Some people suspect Valve is releasing "Crash Course", the new campaign for Left 4 Dead, to placate angry fans who feel the sequel is coming along too soon, at the expense of promised additional content for the original game. Other people couldn't care less and are happy to have a free campaign for their PC version. Still other people get to pay seven bucks to download it for the Xbox 360 version, since Microsoft likes to make money from downloadable content. And still other people have Playstation 3's and don't get to play Left 4 Dead.

"Crash Course" should be available sometime today.