Released and documented.
http://dnsapidocs.scripting.com/
One additional bit -- if you installed the Route 53 RPC handler earlier this week, you should uninstall it.
1. Set config.route53.prefs.flRpcEnabled to false.
That's really all you have to do. At some point I will remove the RPC handler code altogether.
dnsApi2.root is much better at this.