E Source interviewed 51 North American electric and gas utilities to identify which utility peers they consider to be leaders in social media. According to the participating utilities, Avista Utilities is at the top of the social media list because of its innovative customer engagement. The rankings play out like this: 1. Avista Utilities 2. SRP 3. Alabama Power 4. American Electric Power (tie) 4. Duke Energy (tie) 6. Dominion 7. Pepco 8. BC Hydro 9. Pacific Gas and Electric Co. 10. Baltimore Gas and Electric Co. Utility use of social media is evolving. "The focus for top soci...