just like the one that was in craftbook. place the sign "lift up/down" right click and go. i apologize if there is already a mod. i searched for it but i could not find it. i probably failed at the search, but can't blame a guy for trying. and if its not out and someone does make this, then you have my eternal thanks.
yeah i was just reading that, makes me happy to see you guys working so hard so that other can enjoy a modded game. you have my thanks sk89q and all those that are working to make, update, and improve mods
It does exist. its called SignLift... http://forums.bukkit.org/threads/mech-signlift-v0-6-elevators-with-signs-405.2900/