Is there anyway to customize the filename using the recipe?
Currently a news file will be named something like "Newsweek_2010-5-24.epub" I would like it to read "Newsweek.epub".
This way when calibre moves over files to my nook it should just overwrite the old effectively deleting obsolete news.
No you can't adjust the filenames for news files. Eventually calibre will be able to delete news files from the device automatically when you connect it, but not at the moment.