As an avid cycling commuter, I spend a lot of time thinking about how to improve the experience. Lately I've been working on a means of balancing while stationary. Of course one can always track stand, but we all know how hard it can be. So, here's my latest solution: the pedal stand. Have a peek at http://www.youtube.com/watch?v=wJ2pVyUYzsY&NR=1 to see it in action.
The pedal stand deploys a small stand when you pedal in reverse that allows you to balance comfortably while stationary, without leaving your pedals. The stand retracts when you pedal forwards.