You are not going to be happy with the offical keyboard being offered. It is the size of normal controller with the space between the "horns" filled in with a keyboard with really small keys.
I am not sure if they will ever support a mouse as well.
Dunno why the the decision to NOT have mouse support in most xbox360 games. You would think that feature would draw HUGE numbers of additional gamers to buy the 360 instead of settling for a typically underpowered pc.
