Was watching a TV program the other day about a 2 wheel balancing robot which I thought was kind of cool. Not something put together by a large corporation, but by a couple of guys down in the San Jose area (one hardware engineer, one software).

Check it out, especially the video clips of this thing actually working – it is quite impressive and all done with relatively cheap components. The processor that runs it all is an 8 bit PIC microcontroller!