I don't think I need to provide objective reasons for why it would be awesome to have him, those are obvious enough -- so I'll just stick to my personal reasons: I think he can deliver a witty inspiring talk, like what DHH did 2 years ago. The kind of speech that can literally push you and "force" you to do stuff.
He spoke at Startup Bootcamp last year: <a href="http://www.youtube.com/watch?v=pdDGVhqMuWI" rel="nofollow">http://www.youtube.com/watch?v=pdDGVhqMuWI</a><p><a href="http://startupbootcamp.MIT.edu" rel="nofollow">http://startupbootcamp.MIT.edu</a>