Nice use of Google APIs! No one makes 'em like Google. (Hoping to get an internship there myself, with a little help from a guy I know how works there)
In any case, nice script! I intend on using this.
I am curious about the addDNSEntry function, however. I was gone for a year so it seems there's a lot I missed out on, there's a 64-bit server, and why the need for that?