mapbox/tilemill — Issue #1242: not clear how to import KML files... 
Author: jywarren
Created: 2012-01-26 20:51:13+00:00
State: open

some pages (http://mapbox.com/tilemill/docs/manual/adding-layers/) indicate that you can use KML and other formats, but http://mapbox.com/tilemill/docs/crashcourse/point-data/ indicates that only CSV works? I wasn't able to import anything but CSV, got 401 or server did not respond errors.