CD Projekt, have publicly said in multiple interviews that The Witcher would not be brought to consoles. It looks like that's all about to change as the company now has job openings for console programmers on its website. More specifically, the company is looking for programmers and producers familiar with the Xbox 360 hardware.
That's not what has people thinking the job is for The Witcher though. The job requires the Xbox 360 programmer to be skilled in "parallel programming". This basically means "porting" a program that's designed to work in one environment into a near identical product that can perform in a different environment (or architecture). This is on top of the fact that they posted the ad on The Witcher website.