Team Bondi's 1940's themed crime thriller is making it's way to PC in the fall. The PC version is being developed by Rockstar Leeds and as of yet, does not have a concrete release date. Details on the game are out though, the PC version will feature customization such as keyboard remapping and gamepad functionality. It will also sport 3D compatibility, as well as increased fidelity and graphical enhancements versus the console variants.
I've played 30 or so minutes of the game and absolutely loved it, but now that I know it's coming out on PC with 3D support (!), I think I will wait and grab myself a copy via Steam. I'll keep you all posted on news of the PC release of L.A. Noire.