Overheard lists out the most recent Twitter posts ("tweets") related to this company. Anyone, employee or customer, can convert a tweet into a community topic. Overheard notifies the original Twitter poster of the discussion started in response to their issue.
RT @hugorodgerbrown: If you are developing with the Graph API, check this test bench out from apigee - http://bit.ly/doEWRv - it will save you from curl hell.