A couple of the comments left in my original post referenced some great sites I overlooked. I thought them worthy of a post by themselves, so here we go.
A couple of posters suggested the Strange Maps blog. I checked it out and quickly added it to my “must read” list. Some very interesting stuff, twisted, but interesting.
For the Do-It-Yourself crowd, the Cartographers Guild also has some great resources for someone creating their own maps with GIMP or Photoshop. There is also a nice selection of other budding cartographer’s efforts. Many are quite good.
Another excellent contribution was the massive page of cartographic links at the “Swiss Federal Institute of Technology.” Some really good stuff here and mostly free!
My final entry is a pay site, antiqueprints.com . There is a great selection of royalty-free (so no copyright issues) antique map images. Most were only $5.00!
Special thanks to the following readers for contributing these links.
Alex Schroder ( who runs a nice Swiss-based RPG blog in English)
DocBadWrench of the Turning Kingdom RPG blog
David M. Jacobs of the Black Clad Bohdisattva blog
Trask, The Last Tyromancer