Hard to say. Newspaper I freelance for likes the file in jpg, at 300dpi and 8-inches in the widest dimension. They have no camera specs other than being able to output in that resolution (5 or 6 megapixel, higher the better). Staff all use Nikon D series bodies and bag o’ lenses :-). Magazines are going to have higher requirements–sure you will get some input there. Book publishers likewise.
Photographer’s Market gives you an idea of how wide a latitude some publishers have or not. Some just specifiy, “digital image.” Others say jpg and 300dpi. Some TIFF, 300dpi minimum, etc.
Lightroom is a real worksaver in managing and easily outputting the file in a wide variety of formats and resolutions. I’ve come to rely on it a lot. It hasn’t had a very good file manager, but I understand 2.0 corrects that some.
Is that kind of what you were looking for?