[@Cyclone] There's a program called hexographer, with a satisfactory free version, which I lazily made this in as a proof of concept:

[url]http://i.imgur.com/6qJ8AmK[/url]

[url]http://i.imgur.com/6qJ8AmK.png[/url]

You can set down any terrain you wish, make the map however large you want, and add bordered text, etc.

Given sufficient time, I (or anyone else) could make a map in much greater detail.