OK, so a couple things.
First up, please dont say 'Exclusive to 360 and PC', thats like someone saying Prototype is exclusive to 360, PC and PS3 because its not on Wii

Second, although I was initially pretty upset that Valve had decided to go ahead and make a sequel this quickly, I'm slowly warming up to the idea more and more as more news hits about it. My current stance would come under 'cynically optimistic' haha
Loving the fact that not only will we get new special infected, but also 'uncommon' common infected, such as Mudmen, or the fire-retardant infected in their hazmat suits. Basically a bunch of new things to pump lead into that also spice the game up a little!
Also, I know it was posted back in June, but where did you get the information about the original 4 survivors still being available? I find this most interesting...