Great project, it seems that some companies —like Citymapper— use the API[0]. Would be nice if they also contributed with code or supported the author.
A particular thing I'm missing is to share read access to private repos with a link. Could be useful to share work with people that doesn't have a GitHub account (managers, etc)
At the moment I'm using loadCSS (https://github.com/filamentgroup/loadCSS) to render local fonts on my projects. I wonder how difficult would be to create a subset of the font to load first, and then switch it for the full family once the site is loaded (as the article suggests).
Thanks for all your suggestions! Yes, we thought about implementing the hover, but we didn't have time for it. It can be tricky as well regarding performance, so we discarded it for this elections.
[0]: https://citybik.es/projects