Agent G is a Google+ account that will synchronise your Google+ posts to your Twitter account. Once Agent G has rights to post to your Twitter account, simply share anything on Google+ with Agent G that you want re-posted to Twitter, and the app will handle it for you.Considering how touchy Google has been about Google+ accounts that don't belong to actual people, it's possible that Agent G may not be around forever. While it's here though, the tool is a great way to share status updates on Google+ and Twitter at the same time.
You can authenticate to Agent G's site using Identi.ca, Twitter or Facebook, and then authenticate again with Agent G on Google+ with a special key. Once you're configured, all you have to do is share a post with Agent G or a circle with Agent G in it to have the post re-published on Twitter. Another approach is to use the Gplus Tweet Chrome extension we recently featured.