I have just invested in a handy new device from PocketWizard - the AC3. This little device is an addition to the PocketWizard receivers and transceivers which means I can control the flash output of all remote Speedlites from my camera. No more walking over to each light to manually stop them up/down...which was an inconvenience at times. I can also switch off a speedlite without having to touch it.
To test the AC3, I have photographed this artists mannequin and purposely set the lights and different distances from the subject then used the AC3 to match the power output of each light in 1/3 stop increments... all from the camera.
The AC3 will certainly be of great help on location and in the studio on future shoots.