Looks like Google are making their "+1" button a bit more useful:
The +1 Button Just Got Useful: Now Lets You Share Content on Google+ — SiliconFilter
More info here:
Google+ Platform Preview | Google Groups
NB: You'll need to join the group to get access to the technical data on the new feature
The +1 Button Just Got Useful: Now Lets You Share Content on Google+ — SiliconFilter
More info here:
Google+ Platform Preview | Google Groups
NB: You'll need to join the group to get access to the technical data on the new feature