L.D.
I am in the same boat. My daughter Scarlett is 10 months old as well and she is facinated with the electrical sockets. Even though we have the plug covers on she will pick at them and almost get them off. I say "No" in a stearn voice, remove her from the area and distract her with something else. Within a minute she is back at the outlet again.
I would love to hear of any advise you get. I know that there is very little to do when it comes to discipline and a 10 month old, but I would love to hear of anything other folks may say.