While browsing on TED Talks, something I do often, I ran across this talk given by Burt Rutan, the designer of Space Ship One and Voyager (among dozens of other high performance planes) where he discusses his views on the future of aviation and spaceflight. It's a truly interesting 20 minutes. I also can't disagree with his opinion on the greatest aircraft ever made. You get one guess as to what that is. ;)
He also talks about something that's bothered me for many years now, the fact that the past decade was the first time in modern humanity's history (discounting the dark ages) where we've allowed some incredible technologies to lapse with no superior replacements on the horizon.
By the way, if you haven't been to TED.com before I highly recommend setting aside a few hours to spend there one day. It's a video record of a conference that is held every year in Monterey, where some of the best and brightest gather to exchange ideas on how to shape humanity's future into something amazing. Some heady and hope inspiring stuff. Given the state of the world I always find the talks on this site immensely uplifting, and occasionally feel as if I'm witnessing the formation of a real world Galt's Gulch. ;)