2K Games has released patch 18.104.22.168 for BioShock 2, which finally fixes the widescreen issue the game inherited from its predecessor. Download it from Gamer's Hell or WorthPlaying.
Our next BioShock 2 PC Patch is due out tomorrow. You'll be able to download the patch starting at 2 AM PST on Tuesday, February 23rd. This patch is small because we focused on getting it out quickly to fix a couple high priority issues the community had, rather than roll them in to a larger patch that would take longer to reach you. We are working on a larger, more extensive patch now and as testing nears finalization I'll update you on that patch's download date.
Bioshock 2 Patch List - Fixed an issue where 16:9 and 16:10 resolutions were letterboxed versions of 4:3 resolutions, thereby properly fixing the FOV by expanding the horizontal player view as intended. - Fixed an issue where holding the M1 button would not register in Multiplayer gameplay.