Asteroid Capture

Update as of August 2, 2013: NPR.org's Science Friday has a show on this study: Available later today. July 30, 2013, and the NYTimes Science Section has an interesting article by Kenneth Chang, if this link doesn't work, perhaps you can find it searching their database. Apparently, they got over 400 suggestions and were pleasantly surprised by general interest in this topic. Nice to know I'm not the only science fiction buff on this blog.
NASA's page on Asteroid Mission.