In an attempt to keep everyone up-to-date, and to allow sufficient beta testing of new features, Google has announced the Google+ Platform Preview – allowing you to test updates to the Google+ button before they launch to all users on your site. When you’re logged into the account you’ve enrolled with and you visit a page with the +1 button you will automatically see the latest button features.
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The latest updates that I currently see are the new confirmation/hover bubbles. Hovering over a +1 button will display a bubble telling you to “click here to publicly +1 this”. Clicking the button will change the bubble text to show that you have already clicked this button, it will also display if any of your Google+ friends have also given that page a +1.
To sign up for the Google+ Preview Platform head on over to http://www.google.com/+/learnmore/platform-preview/. Furthermore those who wish can feel free to check out my own Google+ account and follow me at http://gplus.to/Metalp3n.