Samuel Blanchard is hard at work. He is building a Gameboy emulator, called Wario's Jewel 7, for Windows Phone. The application is still under development phase. Current version is 0.4.5 which currently doesn't have audio output and portrait only mode. The developer has stated that the application will be made available to the public "very soon" so keep an eye out for it at official blog. Screenshot and details of emulator in action after the break.