The Soladey Ionic Toothbrush requires no toothpaste (sick) because it uses energy created from light which can be either a fluorescent tube, light bulb or the sun, and converts it in to negative ions which when mixed with saliva and water can clean the bacteria off your teeth. It does this by use of a titanium ionic conducting rod which creates all these negative ions. By killing the bacteria it rids your teeth of the smell of bad breath too.
For some reason I still think the minty taste of toothpaste in your mouth might sway me more towards the more convential tooth brush.
Via: Soladey
Looks like you could finally drink orange juice right after you brush your teeth without it tasting horrible!