A headline story on slashdot.org is a link to an abcnews.com story on an engineer who has designed an interstellar generation ship: http://www.abcnews.go.com/go/sections/science/DailyNews/interstellar990114.html Obviously his approach is rather different from ours; he plans to have a large ship (capable of holding a million people) travelling at 1/500 c.