Owners of the PlayStation 3 version of BioShock may have already seen this one (if they completed the game) but now 2K Games have officially released the first teaser trailer for BioShock 2: Sea of Dreams.
You can catch the teaser trailer right here
in the new-look (and now fully functional) AusGamers video library. The ~90 second clip is the very definition of teaser but it does perhaps indicate that the sequel may take place on land rather than the sub-aquatic city of the original.
No platforms or release dates have even been hinted at but 2K Games assures us that they'll have more information for us "soon".