FOSS gamedev and creative worlds

Here's a newe map i am working on. I just got started, and here is the screenshot of what i got so far:
http://www.flickr.com/photos/94351556@N04/9111771381/
The map when completed, is gonna be way larger. More SCREENIES later!!!

Looks alright. You should have some forum of streets or pathways to get around better and that means that less people get lost in your world.