"the understandably frightening and chimeric semicolon" -- HiveGod
I am fortunate to have a family of four confirmed gamers, and three of us think A Game of Thrones is a wonderful game. But we have given up playing it with only three people; there are too many other games that are better for that number of players.
I've tried the tree player set up suggested in http://www.boardgamegeek.com/thread/27306 and it works better than the original set up. You don't get the diplomacy like in a 4/5 player game but I like it anyway.