I have real mixed feelings about this smart meter technology and the whole smart grid business. I think smart grids just make us much more vulnerable to hacker attacks.
That's a good point, I think most of these are using standard 802.11 wifi.. at least the ones in my area are cause I can see them.
Someone will figure out how to hack them.. well start using them as a mesh net.
or maybe they'll figure out how to cheat the meter, These meters run 24/7 even on houses that do not have service, they can kill your electric without ever touching a pole right from HQ.