Electricity is deregulated in two Canadian provinces: Ontario and Alberta. Both markets showed price spikes in the first year of dereguation, but then settled down into a volatile but reasonably stable environment. Alberta's market is dominated by fossil fuel generation and as such reacts more closely to the price of natural gas. Ontario's generation mix is about 50% nuclear.[1]

Several states have Community Choice Aggregation (CCA) laws that allow local governments to pool their community’s electricity need in order to purchase power on their behalf.  While savings is not always guaranteed, many municipalities are able to obtain discounted electricity prices. You’ll have to check with your state regulatory commission. You can get started by clicking on your state in this map.
Just as impressive: Its overall J.D. Power score for customer satisfaction. The 1,000 point score considers price, communications, corporate citizenship, enrollment and renewal, and customer service. At 709, Green Mountain Energy scored the highest of all Pennsylvania companies, well above the 669 state average, and a solid 20 points ahead of the next closest provider we looked at — Constellation.

Since the 1990s, many regions have opened up the generation and distribution of electric power to provide a more competitive electricity market. While such markets can be abusively manipulated with consequent adverse price and reliability impact to consumers, generally competitive production of electrical energy leads to worthwhile improvements in efficiency. However, transmission and distribution are harder problems since returns on investment are not as easy to find.