As a teaser to the big E3 announcements coming this week Valve just sent us some new information on Left 4 Dead 2. The title adds melee combat to the award-winning L4D style of play, with items such as a chainsaw, frying pan, axe, baseball bat, and more. Also making an appearance are new Survivors, boss zombies, weapons, and items, Left 4 Dead 2 offers a much larger game than the original with more co-operative campaigns, more Versus campaigns, maps for Survival mode at launch, and more....