Cell Phones! That's true, we can all capture the moment, so to speak. I need to read Moon, I have read good things about it and it's another one of his seminal works. I read "Time Enough for Love" and enjoyed it. One thing that is pretty interesting is that Heinlein places characters in his books that give "long speeches in quiet moments." In these speeches are his treatises one might say, about governing, religion, spirituality, economics, justice, and the like.