From the Classy Use of Technology Dept comes news of a handheld gadget actually doing something useful at a classical concert. AP reports (and thanks to Gizmodo for pointing it out) of the Concert Companion, designed by former Kansas City Symphony executive Roland Valliere, which displays “a sort of musical road map during a performance, cuing users’ ears for, say, the oboes, muted cellos, or double basses.”A musician at the back of the hall, AP says, wirelessly turns the devices’ digital pages from a laptop. Users can turn off the backlit devices at any time. The gadget has been tested by small groups at four performances, using off-the-shelf Sony Clie handheld computers. Excellent.