[2] http://hjson.org
[2] http://hjson.org
To answer your question more specifically, as long as you can turn a data into JSON format you can run it on Jason. That's what I do in this tutorial where you can turn any spreadsheet data into JSON and then run it on Jason. http://www.jasonclient.org/spreadsheet/
Also there's an HTML parser which turns HTML into JSON format and then renders it in Jason (http://www.jasonclient.org/gallery/show/index.html?id=http:/...)
So I'm sure I can add on HJSON and YAML support. BTW please join the slack channel if you're interested, http://textethan.us8.list-manage.com/subscribe?u=54e23b3fe61... I'm happy to chat :)
Good call on getting something out the door quickly and waiting for feedback. Not sure you need to support both YAML and Hjson, just one human-friendly format would be enough, especially as the conversion is easy enough to automate.