I only got one picture, but I wanted to point out another robot that was making the rounds at BrickFest. John Barnes brought a nifty little robot that would sort different colored 2x2 bricks into circular bins. For anybody that has tried color sorting with the "standard" LEGO light sensor, this might seem like magic, but it's yet another example of a custom sensor that HiTechnic has been working on. Not only is it a nice demonstration of the color sensor, but it's a nice mechanical model as well, with a pivoting conveyor to drop the blocks into the proper dish. This is another sensor that a lot of us have been asking for for quite a while.