We switched over to Electricity NH when they first came out and are now grandfathered at the lower rate (6.99 cents). It's saving us over $10 a month and we have a small house. It's a great savings of at least $120 a year in our pocket and we have the benefit of knowing that their company is helping local businesses and non-profits. Great little company!
http://www.electricitynh.com/
Right now their rate is 7.28 cents while PSNH is 9.54 cents. They also give away free power for a year to one customer per month.