The thing that makes Google+ Hangouts special is its build-in video feature. As it functions now, up to 10 people with webcams can participate in a live audio-visual chat session.
Cool idea. It didn’t take long for some creative and proactive musicians to jump on this opportunity.
I’ve just hopped onto the Google+ bandwagon but haven’t used the “Hangout” feature yet. After reading this I’ll start investigating 🙂