When Henrik and Anna had their panel about cosplay at NärCon they presented the Nordic Reel Icons initiative. In a way it's a branching out of what the 501st and Rebel Legion do, in that the goal is to have screen accurate costumes, and use them to work for charity. I think it's easier to just paste the description from their site:
We are a non-profit organization of people with great looking, screen accurate costumes that likes to dress up and do good! Reel Icons consists of well known characters from many different universes and span all ages.
Reel Icons often works together with it’s Star Wars counterparts, The 501st Legion, Rebel Legion and R2 Builders Club, to collect money for a variety of charity organizations. We dress up in our costumes and appear at conventions, exhibitions, childrens hospitals, birthdays parties, company events and more to show our love for the characters, games, films and TV-shows.
Rather than profiting from our appearances, the money we collect is donated to charity.
Since Nordic Reel Icons was launched last week there aren't many members yet, but they are ready to accept applications. I don't have a suitable costume for this, but it will definitely make me open up to make more pop cultural costumes, now when there is an organisation and a venue for them.
Find out more at the Nordic Reel Icons web site http://reel-icons.net/ - or the Nordic Reel Icons Facebook page - https://www.facebook.com/NordicReelIcons