I have played around with Google hangouts on air here in Zambia. Its an awesome opportunity for marketers and PR professionals. As a Google apps solutions providers in Zambia our company Net Innovation, we are positioning hangouts on air as an affordable powerful tool for marketers and PR professionals in Zambia to live stream branded events including but not limited to press briefings,conferences,discussion panels. and that's just one way of looking at the potential . Save for the tech aspects such as webcam quality, bandwidth etc.knowing how to leverage hangouts on air for lead generation with pre and post event marketing campaigns is a critical part of making hangouts on air a success. I've just finished authoring a quick guide "5 Google Hangouts on air marketing mistakes you can not afford to make...and how to avoid them"