Some basic information on the meters can be found here...
http://www.gepower.com/prod_serv/products/metering/en/utility_revenue_meters/index.htm
There is a pdf link for a fact sheet about the I-210+ meter near the
bottom of that page. As D Yuniskis mentioned, the utility customer has
some options. The changing LCD display reflects these choices. On this
meter, the top big display field seems to be the elapsed kWh measurement
(mostly). The lower left on this one changes: current kW, voltage, and
the letters Adl. I have no idea what Adl means; there is no number on
the bottom then, just Adl. When the voltage is displayed on the bottom,
the top goes to all 8's with a minus sign. So that 888 thing seems to be
just some artifact of the voltage display configuration. There's a
little bar graph at the right middle too. It may be a crude differential
indication -- power use up or down. Seems the lower left can indicate
power direction, like if the customer has solar panels and can pump back
power to the grid.
In the above link page, if you select AMR meters from the left column,
it takes you to a page of options the utility can choose for phoning
home. This meter seems to have the SSL wireless link at the bottom of
the page. There is another pdf fact sheet. Seems it uses 900 MHz
wireless. Later I may run a wireless sniffer to see if I can find new
IPs in the neighborhood.
The gas meter got a new attachment too. The display on that is an
old-school set of geared dials, but apparently it has wirless link too.
So, not much information, but a little bit of help about what is in
there.