Part of the aim of the community is to drum up interest in the kickstarter for the printed Guide that will be starting at some point in the near future, in addition to providing a forum where people can have discussions, show off their work and ask questions about all things map related. I think that the community fulfils its purpose admirably although it may be a little daunting to anyone not experienced in using a computer graphics package.
Official website for the Guide is here:
http://www.quickanddirtymaptutorials.com/
I've posted the two (rough) sample forest maps that I worked on using one of the community's tutorials below:
Addition 26/06/13 23:45
I asked Michael Tumey about the lack of specific information related to the most popular graphics packages and was told the following:"That would be the advantage of having the book, as there will be a chapter on Explanation of Terms where we look at what is the intent of a given task, with corresponding subsections for Photoshop, GIMP, Xara, Inkscape and several other common applications, giving more specific instructions on which tools in those applications needed to perform the same task."
Given this additional information I will certainly be planning to support the kickstarter and would have no problem recommending the book (even at this early stage) for those interested in map/world creation.