One of my players brought this site to my attention, and I've used it to make maps for 3 different settings so far. Very smooth tool use and interface, and easy to fiddle with. inkarnate.com
Highly recommended for GMs and writers with less-than-showcase-worthy drawing skills.

This tool is ridiculously awesome, i'm playing around with it now and it's great. Thanks!

Thanks for sharing, Dungeon Goat!

Just checked it out, myself, and it's pretty darn cool! I still prefer to do my maps by hand (either on paper or in photoshop) but can definitely see using this, as well... save myself some time and carpal tunnel syndrome, yes?

Edited your original post to make the url a clickable link, too.

+1