The video was played behind closed doors at E3 2010. There should be more on the way. British accents make everything better.
Developed by Valve Software, Portal 2 is scheduled to release simultaneously on PC, PlayStation 3, Xbox 360 and Mac sometime during 2011.
It's not often that I want to watch a simple trailer like this again and again and again. And then once more. I already love Wheatley.