Newer Technologies (is that a great name or what) brought out a wall socket assembly, the Power2U, with a USB power cube built into it. Not only that, but a smart cube that turns itself off when nothing is drawing power from it, so it's not another zombie.
Newer Technologies Power2U wall socket with USB ports
Once we installed it, in a common place (near the printers) it was adopted almost immediately by the folks here, in fact, they even started fighting over it, one person unplugging another. Clearly we have to install more units.
Sure it adds to the tangle, but no one is complaining
We've been testing this unit for about six months now and it has worked reliably and dependably. We get power failures here on the mountain (end of the line, first to go out) and the unit has weathered all the storms with no problem—good rugged design.
You can find these little jewels at Amazon for $19, and as low as $17.