I have sites on Amazon S3 and OpenShift, but my Domain Name registar (1&1) didn't support redirection, so I pointed it to Cloudflare and created a rule there to redirect from the root to 'www'. This looks simpler though.
back when google apps for business was free, they had an option to redirect your naked domain to www under domains. then all you had to do was to point your A record to google dns and it would forward it to www.
