Is there a way to see the list of people who shared your site with Google Plus (i.e. people who clicked the plus one button for a specific URL)?
Clicks to the +1 button are not exactly the same as sharing (for example, as part of an action), but you can really see a lot of neat data about +1 and your site using Google Webmaster Tools: http: // www.google.com/webmasters/tools/