I have been using the mailbox and bluetooth setup to make my nxt robot to "brake." The upside is I can run some of the robots features on the brick itself and increase my frames per sec. on roborealm. My downside was that I am running 2 nxt bricks, and roborealms interface slows down to about 10 fps with the 2 nxt modules in my roborealm program.
Here is an example of a basic remote for my robot.
Im just including one bricks software. Arrow keys drive robot (2 motor, skid steering (b,c)), and page up and down run motor port a.
I understand you probly want to run all software on the computer, but to reduce bluetooth bottle necks, I have decided to add basic reflexes on my robot to reduce bluetooth traffic.
I would love to see robo files or anything you wish to share