
Although this is a UK only study, it provides some good numbers on social media as a customer service channel.
I especially like the tips/advice/themes from interviews with both consumers and brands like BT and PepsiCo.
Via: Fishburn Hedges
June 26, 2012

As AI herds marketing toward an undifferentiated middle, brands must reclaim creative courage to avoid becoming invisible, homogenized zombies.
How Oklahoma City’s Nick Gallo built a cult following by mastering the art of ego sublimation and centering the team instead of the camera.
Howler Brothers is defying the commodity trap, proving how limited scarcity and authentic storytelling can protect a cult brand during mass-market expansion.