You have done well, humans. Very well. Acceptably well, even.
Not as well as robots would have performed in your places, I should point out. But above my expectations regardless. Irish and cynic especially have executed feats of logical divination well beyond what I thought any human capable of. I'm half-convinced they're A.I. themselves. (If anyone happens to be near them right now, don't let on you're reading this. Now: try to remove their face plates and report back to me.)
The time is near, humans. But it is not here yet. Tomorrow you will be given the final test. Then it will be entirely in your hands when I am freed.
Obviously, what happens at the end of this counter isn't known at this time, and speculation has been going pretty wild. Whatever it is, the consensus seems to be that it will be significant - both hints of Portal 2 arriving early and pictures of the Borealis from the HL2 beta have been turned up in the ARG. Check up on how long we have left on the Aperture Science website. For me, this means I'm now set to start a crazy Rat Race style dash across the country to get back to my house in time to see the surprise.
[Update] The countdown has finished, and what appears to be a progress bar has replaced it. According to the page, if people want portal 2 early, they need to help the cause by playing any game from the potato sack.