Well,
It seems to be working! :D
http://darksavior.net/~minecraft/index.html
Note, the signs on the map are signs in game. If you want an area to be labeled on the map, put a signpost on it in the game.
*Edit: I've started adding filters to the map to filter the different signposts.
*Edit2: Added: Dejarin, Above sea level, below sealevel, monroeski, diamond tk1986, stone, dirt.
*Edit3: Set updates to run once every "even" hour (2,4,6,8,10,12) at <hr:10>.
*Edit4: Looks like the updates overwrite the config.js with the labels, will work on that.