Haha. When I read the title i was like 'holey shit'. but I've actually been pretty scrupulous about not leaking the demo. when i showed the demo at the UK games festival 'Rezzed' I programmed a self destruct code, so after the festival was over on a given date, the program would erase itself.
Well back during Rezzed wasn't the game only like 5% done anyway? If the demo were released I actually believe more people would have given up waiting because they would lose their patience quicker. Maybe that's just me. Probably for the best not to leak even if it were possible.