Update: the PSN release has been confirmed for a Tuesday, December 6 release in North America and Europe; the PC and 360 release has been confirmed for a Tuesday, December 13 release.
Update: DICE's global community manager Daniel "zh1nt0" Matros says, "We´re aiming for mid December. Will see when final release date comes in."
A newly discovered listing on PlayStation.com reveals the Battlefield 3 expansion Back to Karkand will be launching Wednesday, December 7 on PSN.
It must be noted this is for the Asian region of the site, but there are no North American or European regions, and the content is in English. We're checking with our contacts to verify the date applies to these regions.
As noted previously, PS3 owners will see the content one week earlier than anyone else, so PC and 360 players should expect it around December 14.
Again, Karkand is free to anyone who pre-ordered, and $14.99 for anyone who didn't.