tiles - Are there tools to directly import QGIS projects into Tilemill?

Now that there is a tool to convert an MXD to Tilemill, one must then wonder if the ability to open QGIS documents in Tilemill will ever exist.

Answer

This somewhat exists - here's a page of the various converters available. Exporting CartoCSS from other tools requires both mangling the native format and normalizing differences between how they treat data & the capabilities of the renderer.