The man in the know is Paul Davies, chair of SETI’s Post-Detection Task Group. He spoke to the World Science Festival about the odds of finding extra terrestrial civilizations, the benefits and risks of possible communication, and what he'd ask the aliens if he had the opportunity. Read the excellent "lightly edited" transcript from WSF here.
(When Neil deGrasse-Tyson spoke at the 2013 Wings Over the Rockies Air & Space Museum Annual Gala - via Skype - he was asked what he'd say to an extra terrestrial if he encountered one. I don't remember his direct response, but I remember the tangential issue he raised: Neil deGrasse-Tyson wouldn't reach out to shake an ET's hand, for fear of what appendage the ET might customarily extend in response.)
(When Neil deGrasse-Tyson spoke at the 2013 Wings Over the Rockies Air & Space Museum Annual Gala - via Skype - he was asked what he'd say to an extra terrestrial if he encountered one. I don't remember his direct response, but I remember the tangential issue he raised: Neil deGrasse-Tyson wouldn't reach out to shake an ET's hand, for fear of what appendage the ET might customarily extend in response.)