My understanding (from questions I asked during the kickstarter phase, so they may not longer be operationally correct) is that the Zigbee in the A+ is Zigbee HA (home automation) not Zigbee SE (Smart Energy).
I use a rainforest automation EAGLE to read my PG&E meter.
I could be wrong, and it would be nice to be able to pair the smartmeter with the A+, but this is what I know as of now ;-)