"...how about Erin Esurance?"
Esurance has a new "green" commercial with a smog monster and they urge you to go to their website and see how you can reduce emmissions by doing things they list like carpooling etc.
When I saw this I wrote them and had a bit of back and forth dialog with a customer Rep. I was urging then to put their money behind the green cause by giving insurance rate cuts to hybrids and extreme rate reductions to all-electric vehicles.
I told them I would switch to them if they showed to kind of support. The final word was "stay tuned".