[mrzimmerman]

Ha! This is a novel idea for KV storage. Even reasonably secure if it's the private hosted zone used in the post.

I wonder if you used the public zone option and did the nslookup as specified if you'd run into wrong or empty state while it propagates (assuming you need the value shortly after it's stored). Either way, using the awscli would pull it write away so it wouldn't matter.

Anyway, cool idea!