We’re all ga-ga over social media, but is it the best place to invest your advertising dollars? This week we look at some surprising truths, and an example of marketing gone wrong. We kick off with 2 stories from USA Today – one about social media and Hearsay (a new social media service). And the other about an independent bookstore owner who is expanding her store – even with stiff competition from Amazon. We also look at a new video from Rihanna to see just how badly the mark can be missed. Then we close with stories about new offerings from Google and Hewlett Packard. And you’ll be surprised by who wins…