http://www.animenewsnetwork.com/news/2008-12-08/touhou-anime-project-dojin-dvd-at-comiket-this-month
A simple bullet hell game made by one man has spawned a plethora of doujin works - music, artwork, music, fighting games and music - and even an official manga. Now, a doujin circle called Maikaze have announced they will be publishing a Touhou anime adaption at the next Comiket! With some fairly well known voice actresses, too!