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:
Deviations covers any differences between book canon and MUSH canon. These can be either conscious changes for the sake of playability or changes that are due to us establishing names and other facts that were not know when we started the game but which then were released by GRRM at a later date.
The Westeros network consists of several different sites, including a forum and a wiki, for all your A Song of Ice and Fire needs.