This is IT?
Dave (picked at random) and 8000 other slashdot readers wrote in to tell us that they too had been overcome by the relentless hype machine that is IT, Ginger, Segway, whatever. Read about IT in your favorite hype-dispensing media outlet, each of which thinks that it has an exclusive on the story of IT. Flash diagram of IT. Time. NY Times. Reuters. And don't forget to watch the advertisement, errr, "demonstration" of IT on Good Morning Consumers tomorrow. Update: 12/03 13:37 GMT by T : Segway's webmaster John Grohol points out the segway website as well.
It doesn't have an engine but it has two electric motors per wheel (4 total). Each wheel is independent so it can turn on a dime (no axel). Also, if one motor goes out the thing can still work with just the other one. It also has redundant "sisterboards". Also, the gyroscopes/accelerometers (5) are redundant in that their results are checked against each other.
http://www.time.com/time/2001/segway/index.html