[Full News Story at GameSpot]
Here is the full quote by Gabe:
I'm hoping for something Half-Life related but it's Valve so I'm also prepared to be disappointed. My guess is we'll be adding "12 months" to Valve time in Sep' 11.
We have three pretty big surprises in the next 12 months at least; I can guarantee you people are going to be surprised at stuff we do. That isn't going to stop anytime soon. I'm just laughing because…people will be shocked again.