Could someone please tell me how to download map coordinates for Warcraft?
Thanks,

There's a few different named addons with that function. My favorite is Koordinator and it works just as it should. If you want more then there's an addon called Cartographer, which also creates a more flexible world map and alot of quest help. Koordinator has just been updated 4 hours ago, so you don't have to "load out of date" every time you log on anymore.

Links:
Koordinator
Cartographer

Map coordinates are included with the Thottbot AddOn. Simply load the addon, and either enable via the configuration panel, or type /tloc. The AddOn will also collect data, and update thottbot while you play.

You can get the Thottbot Addon @ http://thottbot.com/contribute.