Thanks! I use acme-tiny quite successfully for my servers; I found it the easiest way to arrange privilege isolation between the ACME process getting a certificate signed and the server that needs access to the private key.

Thanks for your (past and future) work on those clients!

In case you haven't seen it yet, Let's Encrypt is working on a testing-only server implementation called pebble[1] that's based on the latest ACME draft. Might come in handy if you want to start working on this before the production ACME server (boulder) is ready.

[1]: https://github.com/letsencrypt/pebble