Two new projects recently popped up on NXTasy that I thought I'd flag. First, some time ago a poster made a "RADAR display" program that would map the area around Tribot. Well, that poster is back, with an improved version of the RADAR that is much faster, and wonderfully documented. If you want to see what the robot sees, just take a look at this video:
Krystman also has up the code on his webpage here. Nice application, and wonderful visualization.
Another wonderful robot that popped up just a little bit later is a LEGway (or NXTway) that works by using a gyrosopic sensor, not directly sensing the angle of the robot to the ground. Potentially, it could I suspect climb slopes. Well done! Take a look here:
NXTway-G with gyroscopic feedback
Very nice stuff appearing all over!