My next plan is to make a Bukkit/Spigot mod for Builder's Helper; in this case, the 'wand' would be a specially named stick. Bukkit is a better framework for this as it allows forking threads for builds so that there is no pause in the interface while building, and you do not need a client-side mod to support the new object.
In fact, if I can work out how to do it, the Forge Mod will change to use a special stick as the wand, so that it does not need the client-side mod, but that's another issue.
UNIX Systems, ITSS, University of Auckland, NZ
Woe unto them that rise up early in the morning... -- Isaiah 5:11