Sweet! HiTechnic's turn with HTWay ... a two-wheeled, self-balancing, Segway like marvel with a nice added feature...Power Functions remote control! At this point the HTWay requires a HiTechnic Gyro Sensor, a HiTechnic IRReceiver, and a LEGO Power Functions IR Remote Control. Programs for both NXT-G 2.0 and NXC are available. With the integrated wheel-size setting menu users have an interesting option. The provided programs can also be altered for exchange or integration of different sensors to fit specific needs.
HiTechnic has posted HTWay's detailed instructions (including building/ programming steps) and a nice back-history of self-balancing pBricks from the beginning. Be sure to see the video!
I've always loved the way 'AllTheseWays' look like nothing is happening when they are performing at their best...for me anyway...just standing there.