Thanks! If you're interested in deploying to EC2 then you should also look over Mindy Preston's posts [1]. There will also be more work done on improving cloud deployment over the summer [2]. I expect it won't be too long before we can have a heroku-like experience/system for easily building and deploying Unikernels to third-party clouds.
I've been doing Project Euler in OCaml recently so this is a perfect excuse to expand my horizons.