This was already announced in modding thread like a year or so back, i thought that my homie's zeal will burn out on this, but it looks like it didn't.. good for him. After what bethesda did with fallout franchise i don't want to see another fallout in first person perspective, so my vote is nay, although time will tell how this game is going to develop.
this guy does have ambitious plans. To support Windows Mac and Linux simultaneously, is no small task. However it's more likely for a radscorpion to part with it's tail, than for a Polish fallout fan to complete the task, he advertises to do. My homies are usually just this kind of people..