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:
Society describes various key aspects of life for characters in the Seven Kingdoms. The information is divided into three sections given that Dorne and the Iron Islands in some ways are distinctly different from the rest of the Seven Kingdoms.
The Westeros network consists of several different sites, including a forum and a wiki, for all your A Song of Ice and Fire needs.