So far as I can tell, the standard nomenclature is that a "smart meter" is a fancy computerized replacement for the traditional electrical meter that goes outside your house. I don't know who built ours, but it does have some kind of Zigbee wireless support.

A while ago, I managed to find the proper people at our power company and got myself a "remote display" (battery-powered LCD contraption, roughly the size of a cassette tape case, but thicker). There's a not terribly user friendly process where you type some digits from the back of the thing (a MAC address or something) into the utility company's web site, and then it all starts working. My particular remote display is manufactured by Honeywell (or really, some small startup that they bought).