2K has announced Protector Trials, the new single-player add-on for BioShock 2, is now available for XBL and PSN and it will run you 400 MSP/$4.99.
Granted, you've known it's been coming for a while, but that was back in July so you may have forgotten about it.
In Protector Trials, you play as Big Daddy as he defends his Little Sister against "swarms of corrupt Splicers who are hell-bent on stealing the precious ADAM that she gathers from corpses".
The pack includes six new maps, three of which contain difficulty levels based on "favorite locales" from BioShock 2; new unlockables including never-before-seen concept art and videos; and seven new Achievements/Trophies.
Go get it.