Hypersonic flight news

http://www.washingtonpost.com/business/technology/sfo-to-jfk-in-less-than-an-hour-it-could-happen/2012/08/14/5c3cede2-e5c3-11e1-9739-eef99c5fb285_story.html?wpisrc=nl_tech
I'm not holding my breath about the hype of commercial travel, here.  What I'd rather see is the possibility of super-fast underground trains connecting our major cities.