One of the best G+ tools, CircleCount has an update on their dashboard page. You now can get an nice summary with the following
– number of public posts you have written
– number of plusones/reshares/comments you have received for these posts
– the same numbers but as average numbers per posts
– the number of public reshares you have done
– the number of community posts you have written that are visible on your profile page
You also get the trend for each statistic based on your last 50 posts. Seems like I need to do better :)
You can check your numbers (the service is free) here circlecount.com/dashboard Simply login with your Google+ account.