See here:
http://www.bettendorf.k12.ia.us/News/Front...ercraft2_sm.jpgImagine this with an in-deck fan instead of the leaf blower, add two giant fins at the edges for turning and maintaining direction, and some gyros for maintaining course.
The ramifications on stunts performed with a hoverboard would also be pretty interesting. Consider, for example, that if the gyros were (momentarily) disabled, one could simply turn around without changing direction. This would allow for: A. 360 degree spins without leaving the ground, B. easy firing at anything behind you, and C. Stopping or changing direction by re-activating the gyros when you reach your preferred direction. Moreover, the low friction would allow for VERY high speeds; wind resistance would be the only thing keeping you from accellerating indefinitely, perhaps improving the movement rate multiplier to somewhere between 7 and 9. Although recoil would, initially, appear to be a major problem, the gyros I specified earlier would make recoil pretty much equivalent to that of firing while running on solid ground.
The tech for all this is pretty feasible, too. Carbon honeycomb mesh, high-discharge lithium-ion-polymer batteries, and high-torque outrunner brushless motors are easily obtained in today's market. (Of course, battery life would need to increase tenfold for a hoverboard to be usable for more than twenty minutes on a charge). Although miniature, low-power gyroscopes do not yet exist, they are quite clearly obtainable in the SR universe; what do you think drives such gadgetry as the gyro-mount?