TVGB: "TVGB's inboxes have been graced by forwarded emails that suggest Valve is getting ready to do some play testing for Left 4 Dead 2. Yeah, considering that L4D was released just six months ago, seeing that voluptuous "2? at the end of "Left 4 Dead" drew out a collective "hmm?" from us as well. But no matter how loud we hum, it doesn't rule out the possibility that Valve is already batting away on a zombie apocalypse follow-up and could quite possibly be looking to test out a few things here and there."