From Fan History Wiki
DeviantART is considered the world's largest free internet art community, with over 80 million works of original art and over 11 million members. It includes artists that do fanart but in total it is an art community. It was created "August 7, 2000 by Scott Jarkoff, Matthew Stephens and Angelo Sotira, amongst others." 
The site unfortunately has a somewhat homophobic reputation even though a good third of the administrators are GLBTF.
DeviantART does not allow sexual imagery of any kind. Sexual imagery with children is strictly forbidden - virtual (ie, drawings or 3d) or real - is strictly forbidden. Enforcement of this policy is not always consistent. Googling shotacon site:deviantart.com brings up many pages but most of the art tends to be non-sexual pictures of children.
In April 2008, the "The “Orphan Works” Problem and Proposed Legislation" was a hot topic of discussion. There were numerous posts which mentioned it and were unhappy with the proposal.       
- DeviantART @ Wikia
- DeviantArt: Like FriendFeed for Artists: Mashable article dated April 18, 2008
- DA, where art... wait, no. by pulustajat on February 10, 2010