Holy crap, I've been wishing for this for a long time! Thank you very much for creating this!
Edit: http://www.bootrino.com doesn't seem to load.
I have not yet decided if/when to release bootrino - I'm not sure if there's enough demand to be able to do this sort of thing.
You can however have a look at Lunikernel.com which is closely related to bootrino.
I made Lunikernel.com because I needed a standard packaging format for tiny operating systems for bootrino to run.
Lunikernel.com isn't as exciting as Bootrino, but it's something to look at whilst i think about whether the world needs the ability to boot any OS on any cloud. Seems to me that serverless has taken the wind out of the sails of tiny operating systems and Unikernels.
I've been looking at a cloud based project that is actually completely blocked because of a vendor who is focused on supporting a use case centred on a "rack and run" deployment method. Their entire stack is designed on PXE booting. Their software is actually a pretty huge enabling factor in this project so if I could PXE boot it on AWS this would be a viable project.