It would be super useful to be able to integrate the burndown chart to README.me. This way, we could have the current milestone statistics right in the project home page.
I imagine this could be easily achieved by creating an endpoint which dynamically returns an image. This endpoint could implement a few caching strategies to not overwhelm the server for example keep in cache for 24 hours or 12 hours.
Since it can require authentication for some repositories, some kind of Token could be provided by URL parameters, this Token being generated on config time during first authentication.
This way, it would be completely compatible with the Markdown syntax.