To echo rebbot: Articles on "What is Digital Photography?", ie what is in it that makes it something other than using a memory card instead of film. I think digital is fundamentally different from film, in that what is a good digital capture is a different thing from a good film capture, but of course a good image reamins a good image. But digital offers a different way to this good image.
And then of the issue of what is image manipulation and what's wrong or not wrong with it. Can sure create a long sustaining series of articles and views on these issues.
Then another section on whats next in photography, eg beyond auto focus, but selective focus during post processing, more and more megapixels, storage problems, any future in film, etc etc ... just too much .. wont mind contributing to all of these