Minor note. I just received the NYSEG bill for a month of heating and powering our Victorian farmhouse in upstate New York, with 100% renewable electricity in the middle of winter: $429.36. Out of curiosity, I went back and looked at our bills from the same time last year, when we paid to heat and power a similar aged (1880) almost identical sized rental house in Sausalito, California: $462.11.
In Sausalito, the bill was for about half natural gas and half electricity of whatever provenance PG&E chose to provide (ie mostly not renewable). Here the electricity is supplied by Sterling Planet via Agway Electric, and delivered by NYSEG.
The main difference is that the house here, having been owner occupied, is insulated to a more-or-less average contemporary standard, whereas the rental house in Sausalito was not (presumably because the landlords had had no incentive to do so). Also, electricity here is somewhat cheaper than in the Bay Area. These effects are enough to more than overcome the difference between about 3000 degree days and about 8000 degree days, as well as the premium for renewable power.
My smugness knows no bounds following this bill :-)