The idea so far is that Koi will be a simple, object-oriented language with a syntax much like Ruby's, but built from the ground up to avoid blocking IO and using Fibers for concurrency. On a whim I decided to start from the bottom and am currently working on a VM prototype for the language. The VM is currently written in Ruby for ease of development/experimentation, but will be ported to C once the toolchain/architecture is somewhat stable.

I am interested in hearing any suggestions/tips that you have for the language's design and implementation. At this point it's impossible to tell if the language will be useful, or just a toy. But I would like to give it the best chance possible at succeeding and learn as much as possible in the process.

For those interested, the experimental VM implementation is here: http://github.com/aarongough/koi-vm (Note that it's very incomplete, slow and changing quickly...)