2K has passed over the first three shots of the recently announced BioShock 2 Sinclair Solutions Test Pack.
Sinclair Solutions (nothing to do with Sir Clive though) will launch this March for 400 Microsoft Points or around $5 if you're on the PlayStationNetwork (probably around three quid).
Other expansions are planned over the coming months that will be downloadable extensions of the single player experience. These packages will include more narrative, new tools and new challenges that extend the lore and fiction of Rapture.
More info on the DLC here.