It would be a simple plugin that just turns a redstone lamp on or off that does not need a redstone torch or restone wire near it. This could be accomplished by the use of a /lampon and /lampoff and then right clicking the lamp you want to stay on or off. After that the lamp should stay on forever until you do the opposite command. Any takers?
I'd love this plugin also. Lamps look good, but I don't use them because having some sort of power source on them looks ugly.
Working on it EDIT: Umm i can't find a way to do this plugin,because there is no function to set the power of the blocks :S Sorry.
Ive also wanted this so I spent some time and well here it is: http://dev.bukkit.org/server-mods/lumosmaxima/