Really, it's /duplicator. And it only works on servers with the duplicator add-on enabled.
I personally suggest the Stunt Plane, the too far limit breaker, the Biplane, the Sniper Rifle, the Auto Rocket Launcher, the Minigun, the Shotgun, the Flak Cannon, and (if you're planning on moving people long distances, like say, between planets in The Planets map) the Falchion Battleship. That's in the Modification Discussion, just FYI.
Oh, and I suppose I should get to work on a newbie tutorial. Sounds like a fun project. Also, the Wand is for breaking the bricks that your hammer can't break. A bit more dangerous, but more useful.
@ WRB852: Totally. Kudos, Voar!
Cool, my mods have been noticed!