I recently came across some info I found interesting that I thought you other geeky mama's might appreciate. BC Center for Disease Control (BCCDC) asked BC Hydro for permission to test some of their smart meters. They set them up solo and in a bank of ten meters and tested the emissions from different distances.
HOW DID THEY MEASURE UP?
This chart compares the emissions from a smart meter (outside the home) with the emissions from some common household devices.
Check out BCCDC's page on Smart Meters here