The modding API for the widely praised Witcher 2: Assassins of Kings has entered its beta stages, and signing up for it is something that you can do. All of the cool kids are doing it. The application is called REDkit, respectively, and the developer wanted to produce it faster, so that’s why they are inviting lowly non-witchers such as yourself to help out.
The signups for the beta will remain open until September 30th, and the application form has fields to fill out for what would be “Your website” in addition to “your mod samples.” It’s fairly safe to assume that CD Projekt RED is encouraging that everyone who enters the beta testing should actually tinker around with the tools as much as possible (otherwise they wouldn’t be of much help at all, and that would be silly).
Source: CD Projekt RED