In case anyone is interested, I just "finished" a script that exports all books in separate folders according to book type. It took me awhile because I'm new to python. I actually did it in perl first (which I'm quite used to) then I converted it to python. You may want to change some of the variables to suit your system.
Please, If someone can help me to make this work from a button in the calibre gui, or improve on the script in general, I would be grateful. As it is, it is a linux cli script.