The January 2010 issue of Game Informer states that there won't be a new Half-Life game released in 2010. What's more, it's not even clear what form a new game would take. It could be Half-Life 2: Episode Three or it may be Half-Life 3.
I really hate you now Valve.
I don't think they really even know where they're going with this plot anymore.
I, a die-hard Half Life fan, didn't really think they'd do that to us either, but they did:
"We don't know entirely what's happening in the next episode, but we're gonna figure it out!" laughed Speyrer. "There are always things we want to do that we can't because of the constraints of either the story or the arc we've laid out for the gameplay - or just time. So we shelve them and carry on. Ideas fly around here quite a bit, so we have this huge laundry list of things to try for the next thing..."
Note that was said about ONE year ago. So, about one year ago, they said they don't know what's happening in the next episode? Now, ordinarily, I would just say that is Valve being secretive about what is going to happen; but the fact that we haven't seen screenshots, trailers, or any other info about the game? I think they really don't know what to do with the story. I seem to recall something Laidlaw said prior to that article about not knowing what they were going to do next.
Maybe I'm just too angry at Valve right now to do anything other than foam at the mouth and point fingers in random locations while chewing on my keyboard. Maybe I have the space madness. Whatever it is though, Left 4 Dead 2 and all the publicity it received (flying boycotters to Valve HQ and such), and the rumors of Portal 2 (don't get me wrong, I love Portal, but...) are not HELPING me calm down.
Sorry, but I'm prone to angry rants when it comes to the status of Episode 3. If only they'd give us a screenshot or some information about the game.