I am excited about Limbo
http://www.giantbomb.com/quick-look-limbo/17-2852/
update: just finished it. amazing game.
It's a very minimalist platformer. There are two buttons being used. A to jump, B to push and pull boxes and use various kinds of switches. There is no dialogue, written or otherwise, and apart from a brief blurb that isn't even in the game, and the very brief ending, there is no indication of a story. You wake up and make your way through spooky forests, spooky factories, and spooky rooftop cityscapes, all while solving challenging and clever puzzles (often involving gravity shifting mechanics, especially in the late game) that, with one possible exception late in the game, felt like a very natural progression, almost like what you'd expect from a Valve game.
Apart from a very, very few enemies (who never utter a sound), the game is empty of people, except for your own black silhouette (which, apart from the sound of footfalls, also never makes any noise the entire game). The game is purposely very bleak: everything is in shades of black and white. As I mentioned before, there's no dialogue and almost no story. The use of music and sound effects in a lot of the game is very sparing, and when they are used, I felt it was to great effect (mostly in the factory levels). Oh and also the ways you die (and you will die, a lot) are often quite gruesome, whether being shredded to bits by spiked wheels, watching your blood drip from the bottom of the platform that dropped down and crushed you, or being impaled through various parts of your body by spikes, among many others (accompanied by appropriately nasty sound effects).

The game is only about five hours long, even if you're like me and get stuck in a few places for a while.
sorry to bring this up twice in one thread, but I'm surprised, especially in a place like the QC boards, that no one has brought this up (especially as it seems to be getting glowing reviews all over the place). It seems like the sort of game we'd all enjoy.