Stick an axle through it and have a motorised unicycle.
Better than travelling on a pig. :-Y
Seriously though, it could have an output side or axle that turns or oscillates side to side. But maybe that's too far from the Minecraft idiom.
Seems the CraftBukkit team are still bug testing/developing the new version. No official release yet which means that none of the plugins have been updated yet.
I've also noticed that our permissions plugin has had development stopped, joy.
Aren't I quick.
Server is now online and at 1.8.1.
Only plugin I could update was Essentials. The rest are on older versions. DynMap seems to still be working.
Tread carefully.