Sea of Dreams

I am getting pretty excited about Bioshock 2, as you may have read somewhere.
I spent a few of my free minutes before work here perusing the teaser site, Something in the sea. I really like what they seem to be doing with it, for some reason the tension of all the notes about abducted children and bizarre sightings really gets in my head. I'm imagining this fast armored thing coming out of the sea to steal little girls and spirit them away to the underwater city of Rapture.
According to released information about the upcoming sequel, you'll take on the role of a Big Daddy, the primary antagonists of the first game, with the goal of rescuing those adorably creepy Little Sisters from the new baddie, the Big Sister.
I was initially concerned since the original Bioshock team (2K Boston, home of Ken Levine and now Shawn Elliot) aren't involved in development, the duties rather falling on the newly created 2K Marin team. I did read that some of the original team members that worked on the first game are heavily involved in the Marin studio, which is reassuring.
The first gameplay footage was shown, which introduced both the Big Sister, and the player character's new look (I get a drill arm, sweet!), along with some cool new underwater concepts. At one point in the video, the agile Big Sister floods the entire room you're fighting in, but because of your diving-suit, you appear to be capable of surviving, with no visible oxygen gauge counting down. I really hope they don't put a limit to how long you can stay underwater, as it doesn't seem like developers can pull it off without using your potential drowning as a source of tension.
The water effects looked excellent, just like the first game, with the new underwater sequence full of detritus and filth after the room is filled with sea water. There have been some negative comments about the game being a return to Rapture, but I feel any other location would have to be a new game entirely, instead of a numbered sequel. Maybe something else with the -shock suffix, (Bioshock being the spiritual successor to the System Shock franchise). But until Volcanoshock or Mechashock come out, we're going to have to live with this new iteration of a known location.
I just better be able to stab a whale with my drill arm.