http://www.prutchi.com/2012/03/09/d-i-y ... lly-works/
The more I thought about how I'd go about sticking fly wheels (on gimbles at 90 degrees to each other) in a hollow-hub style wheel, the more it seemed like it realy should be feasable, so I did a search to that effect, and this is what I found... http://www.prutchi.com/2012/03/09/d-i-y ... lly-works/
So it looks like I'm not entirely crazy after all (or as innovative as I might have liked to think, but hey, you take what you can get), people have been using almost the exact same design for years to stabilize cameras. I mean, the camera is sitting on top of the "X", where as I was planning to sit between the gyros recumbent style, but its the same basic idea as a bike; you've got a lot of weight distributed along a "forward facing" axis that you want to keep more or less level along that axis. After a little more digging, I stumbled across this....http://www.rchelicopterfun.com/heading-hold-gyro.html
So it looks like stabilizers can be had for a fairly reasonable price, if you are so inclined. These are designed to controll the heading of an rc helicopter but with a little tweaking I'm sure we could get them to do our bidding. Personally I am of the mind that on a bike this would be better handled by a rider becoming accustomed to the gyro effect and simply countering by shifting his own weight the way a camera man would with a camera, but it might be fun to play with some stabilizers all the same.