The Cult of Rapture reports that a PC patch will be released for BioShock next week, as well as new downloadable content for the Xbox 360 edition that will be included in the PC patch:

Many of you have been asking me about the status of the BioShock PC Patch and Xbox 360 Title Update, and I have some good news for you.

Both the BioShock PC Patch and the 360 Title Update will be available next week. In additon to these fixes, we will be releasing downloadable content free on both Xbox Live and for the PC, with the DLC bundled into the PC Patch. A full list of bug fixes and everything included in the DLC will be put up on the Cult of Rapture when the downloads become available.