How awesome would a 'every man for himself' map be, 6 person FFA. Everyone could kill everyone. The only real problem I can think of is the spawns. The map would have to be huge to hold 6 different spawns (bigger than forest fight, but smaller than the AO pvp maps). The score will also have to be high. At least 25 so the game doesn't last 20 seconds.
There should be a scoreboard option to the side you can minimize and enlarge, much like COD. Nobody wants 1/2 their screen filled with 6 different peoples scores :-)