BoingBoing reader Avi Solomon says:
Edgar Mitchell,former Apollo 14 Astronaut maintains a message board where he answers questions put to him by the public. He is one of the few Apollo astronauts who is in public contact and the message board is a rare chance to put your own question to a man who walked on the moon. The thread I link to is one in which Dr. Mitchell discusses the impact of seeing earth from space. Many other threads on the message board relate to interesting details of the Apollo missions.