The BalBot Advanced. Build yer very own cool balancing robot complete with a groovy custom personality! Hah, eat that Japan Inc. Requires just $479.95 and some geek juice for blood.
The BalBot Advanced is not only a self-balancing robot platform; it also includes a microcontroller board (called BrainBoard), which you can program to customize your bot. With 17 expansion port connectors, the BrainBoard is designed to allow easy, “Plug and play” addition of more sensors and electronics…You can then modify the sample code to give the bot its own character and capabilities. So, with only some assembly and programming effort, you could literaliy have a balancing robot with its own custom personality!