In a medium skillet, melt the butter over medium heat and cook the shallots for 2 minutes. Add the wine and vinegar and bring to a simmer. Cook liquid until it starts to thicken. Stir in the heavy cream and simmer for 4 minutes. Stir in the parsley, salt, pepper and scallops. Simmer the scallops for about two minutes or until they are a milky white. Serve immediately with rice pilaf.