My second question is with respect to some of the challenges in quantifying the overall benefits of these systems. One of the things I think Carol had mentioned was that you were doing a study with various communities in terms of how to measure the energy consumption of these communities. It would seem to me to be a logical step to define the metrics for how successful we can actually be in this. That ends up being the challenge--to determine how we know there's a benefit.
How is the research to develop this going across these communities, and are we any closer to developing metrics for how successful this program could be?