Wow...thanks for all the comments and dialog! I am glad my little sample map has generated some actual discussion!

As a bit of useful info, I initially saved my map image in jpg format with quality set at 100. Then I used Irfanview to rachet the quality down to about 50. The image went from 343kb to 91kb, but I could see noticeable artifacts, especially around text.

Well, I decided to save the 100 quality jpg image as a gif (also using Irfanview and it shrunk to 122kb. Larger than the 60 quality jpeg version, but MUCH better quality. Its perfectly clear now. The large blocks of color and generally low color count of CC maps lends itself well to the gif format.

I uploaded the gif version, so check it out now. The new attachment mod actually allows you to upload a new version of an existing attachment, so there is no delete/readd hastle. I'll play a bit more with this map this weekend and post an update...thanks again, guys!