Iron Sky is produced in collaboration with an on-line community of film enthusiasts. At Wreck-a-Movie, everyone interested in chipping in with their ideas and creativity can read the tasks given to the community and take a shot (write an entry) at them.
http://www.youtube.com/watch?v=Xn4DW1uvsAE
From Wikipedia:
Iron Sky is produced in collaboration with an on-line community of film enthusiasts. At Wreck-a-Movie, everyone interested in chipping in with their ideas and creativity can read the tasks given to the community and take a shot (write an entry) at them.