In theory, it very well could be. They boot Linux, share pr0n (there.......they've networked), then reboot into Halo, network together to play (Xbox does use ethernet to join together last I checked......and, again, they've had to network to play. The only way I can see you saying they haven't is the fact that there's only 2 X-boxes--you can argue they used the equivalent of a null modem), and then play each other.
So, as of now, 1/2 @$$ LAN
