i dont know if something like was started before...but im going to make this discussion thread about the portal series. (and to be more precise, portal 2)
so what DO we know as of the moment you finish reading this sentance?
Single Player
I know that glados is coming back in P2, and that P2 will be on ALL major platforms.
i also know that there are new gameplay mechanichs like the repulsion and propulsion gell, as well as the pneumatic diversit vent and the thermal discouragement beam.
Co Operative.
all i know is that there will be an online and local co-op story that is seperate from the SP story..
the characters are a modified personality sphere and a modified turret, and they EACH have their own portal guns.
so...what do YOU know?

http://www.gamesas.com/index.php?/topic/1080296-portal-2-discussion-it-has-co-op/page__p__15731082__fromsearch__1&#entry15731082 a Portal 2 thread. Feel free to post your gamertag/ steam id/ psn id in that one if you'd like.