Perhaps its more logical to refer to all of these types of action as "broadcast" rather than "share" actions. You are "broadcasting" a picture to facebook, or a

Perhaps its more logical to refer to all of these types of action as "broadcast" rather than "share" actions. You are "broadcasting" a picture to facebook, or a link to the file via twitter, or the actual file via email. By referring to these actions as broadcast rather than share actions, you convey to the user that they are relinquishing power over that data, once the genie is out, you are not stuffing him back in. A good icon would be a radio antenna broadcasting things. Just a thought.