Got the dock. It's great. Way past due, but great.
Incredibly, for $40, it does NOT come with a freaking power cord. And, of course, plugging in random USB chargers yields varying results.
With a 500 milliamp Motorola charger powering the dock, the Nexus 7 only charged to 57% capacity overnight. With an 850 milliamp Samsung charger, it reached 100% overnight.
ASUS really sucks for omitting a charge cord, not only because the price is absurdly high and we deserve one, but because of the worldwide confusion and lack of standardization of Android chargers. Many people will plug in any available charge cord, have poor results, and blame the dock.