HEY!
Posted Apr 18, 2011
This shit comes out in like 5 hours! WHO'S READY FOR PORTAL 2?!?!!
Also in before "wheres the sdk??" (will it even be released with the game?)
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Posted Apr 18, 2011
Replied
4 minutes
later
I doubt it will be out immediately at release, but probably within a month or two. Portal's official SDK was out after 3 months I think? Valve has gotten a lot better about it, L4D2's wasn't very long after release.
That said, I expect custom maps to be made within days of release. And they had better be uploaded to TWP! 
Posted Apr 18, 2011
Replied
28 minutes
later
Heh, skidding in under the stone door there Indiana.
But I have a feeling VALVe will have the SDK ready a little earlier than a month. I remember them saying something about having it ready at release, and while I'm not that naive, I think they'll be pretty good about it. Especially with all the hype they're throwing up.