The simplest possible DNS-based service which I could write to explore Amazon's DNS offering has to be dynamic DNS, so I set one up..
The record skx.dhcp.io can be updated to point to your current IP by running:
Or to a fixed IP:
The code is modular and pretty nice, and the Amazon integration is simple.
(Although I need to write code to allow users to sign-up. I'll do that if it seems useful, I suspect there are already enough free ddns providers out there - though I might be the first to support IPv6 when I commit my next chunk of work!)