Thanks, Tina -- I'll look forward to hearing what they can do.  Much appreciated!

 

@ Fenier -- The reason I want the option has to do with permission and intent, not theft prevention.  If there's a "share this on Facebook" button right under an image, it gives tacit permission to anyone who thinks it might be cool to show their freinds this pretty picture they just saw.  No button means any re-posting would be intentional theft, as opposed to well meaning "sharing." 

"If your pictures aren't good enough, you're not close enough."  ...  Robert Capa