If you go to the bottom of the page at http://allthingsdistributed.com/, you'll see that the blog actually requires "Movable Type Pro".

AWS doesn't provide a way to serve from S3 without the help of a CNAME redirect, which means that you're out of luck if you want to use the Jekyll+S3 setup with a naked domain name (naked, as in no "www" or "blog" subdomain). And it also means that you're going to have to get some other server (Google Apps can do it), to redirect your *.domain.com queries to www.domain.com. And then your users' DNS is running all over the place, incurring, in my opinion, unneeded delay.