Blood of Dragons is the only author-approved MUSH based on George R.R. Martin's A Song of Ice and Fire. Play the Game of Thrones and become a part of the history of the Seven Kingdoms:
Religion discusses the religions of, primarily, Westeros proper, but it also makes brief mention of other known religions in the world.
The Westeros network consists of several different sites, including a forum and a wiki, for all your A Song of Ice and Fire needs.