.tk = the country code for Tokelau, a South Pacific island under the control of New Zealand.
That seems pretty... random. Also if you notice the site has a little thing at the bottom that, when clicked, brings up a message saying that "Punching yourself in the head counteracts Valve time." It basically says to punch yourself in the face for a game release.
Also "Borealis" is written in the concept art on the right side of the screen. Its supposedly a big deal in the game series, and is supposed to be big in the next installment.
My thing is: This could be true. I mean, Valve might have put this up with a weird web-link to just mess with people, or it could have been some other random nerd who hates people who want this game. It seems real and fake enough at the same time.
I say, just wait until June 13 and see. They aren't doing much else, and they just made a sequel to Portal that apparently nudged at the next game. I wouldn't be surprised at an announcement that the game is in the works, but nothing more.
