A job posting on Crytek's website reveals the game developer is working on a Linux version of CryEngine. The company is looking for someone to "maintain the Linux support for CryEngine", but it's unknown if Crytek has any concrete plans for the Linux platform.
First spotted by Linux Games, the job description doesn't mention porting existing titles. Successful applicants will be charged with supporting both internal and external developers, though. Engine licensees will presumably have the option of offering Linux versions of their games.
Linux has a minuscule installed base among gamers, but Valve's Steam console is expected to run a variant of the OS. If the so-called Steam box is a success, the size of the Linux gaming market could grow dramatically. Valve already has a Linux version of its own Steam engine, and the studio has been steadily porting its back catalog of games. Plenty of indie developers are offering Linux variants of their games, as well.