Hey, maybe after they make Portal 1, 2, 3, and 4, they can start focusing on HL: EP3.
That would be cool.
Nonsense, Valve will most likely begin work on Left for Dead 3, and Team Fortress 3 before Episode 3.
Valve really needs to get episode 3 out the door asap... it better be already well in the works and it better be the next game released after Portal 2 or I will seriously have lost faith in Valve.