For those interested in making maps for CoD2, a good place to start would be the
IW Nation Call of Duty 2 Mapping forum. This forum, which had been fairly dead until yesterday, has suddenly sprung to life!
It has been a "fun" time just getting set up to run the tools, but I've got the map editor running and have perused the included .map files. The prefabs are implemented in a very nice way!
Please post links to other mapping resources in this thread as you find them.
EDIT: I've begun to assemble a list of mapping resources in the first post of this thread.