in today's Google I/O Conference , There is a developer preview of the Google+1 button in the Session, claims will be released within the next few weeks, for use by webmasters you, in your Web site to join the Google+1 button. Its function and role like Like to Retweet and Facebook.
webmasters directly through a form to generate the Google+1 you want the button form , Which can also activate JS callback function, allowing developers to set the actions after the user clicks the +1 button on their own, and to track the click.
if your site has its own user login system , You can also use their own user system track which user a +1 button.
+1 a few weeks later button will be available in the Google Webmaster Central for webmasters use, apply if you haven't tested can hasten to apply here: https://services.Google.com/FB/forms/plusonesignup/.
