Interesting, but long article on Elon Musk . If you dont want to read the whole article, at least check out page 5.
http://www.businessweek.com/articles/2012-09-13/elon-musk-the-21st-century-industrialist#p5
Elon Musk has a couple ideas for a quantum leap in travel. Who knows, he may be on to something, or he may be just hyping something to attract investor dollars to keep funding his ventures, but I would be curious to hear more details about what he has in mind.