While this is not really related to Hatsune Miku, it’s still something that will hurt most of us pretty bad. Nico Nico Douga is about to remove all fanmade anime related videos. CNET Japan reported that Nico Nico Douga agreed with the AJA (The Association of Japanese Animations), Japan Video Software Association (JVA) and Motion Picture Producers Association of Japan (MPPA) to remove all copyrighted videos belonging to members of these organizations. This includes all fanmade videos (MAD videos, redubs, loops, etc.) and anime episodes in general.
Via Canned Dogs (head over there for more infos)