Not much is generally known about Smart Meters. First of all
they are not at all smart. Some of the things they do
You can read more about it in this two page pamphlet please: page 1 page 2
There is a lot of confusion out there between Smart Grid and Smart Meters (AMI) . They are totally different things and have nothing to do with each other. The idea of a Smart Grid is to get us all using renewable energy generated locally for maximum efficiency as opposed to monopoly fossil fuel power companies controlling the price and distribution. For more info, read this excellent report created by Dr. Tim Schoechle, who invented Smart Meters and now speaks out against them.
If you are in the Seattle or Pacific Northwest USA, please see here for more information.
There are various showings wherever you live of the film Take Back your Power. Please see the take back your power website mentioned here
Lastly, take a look at this free guide from Josh del Sol Beaulieu about how to make yourself safer against all the Wi-Fi EMF radiation out there.