I just came across the PostRank social analytics platform and I have to say I'm pretty impressed, social media analytics on steroids for bloggers! It only took me a few minutes to get the account up and running, connect it to our blog and various social profiles including Google Analytics and get the first insights (with retrospective data).

Have a look at the screen shots below and you see how content posted on our blog turned into post engagements outside our website, what blog posts have the highest engagement rating rather than just traffic, where else our content was shared and what our top performing blog post of all time were. Very cool. And best of all, it's free so get an account now!