Over on the Photopreneur site is a post on “How to Catch a Photo Editor’s Eye.” While not aimed at the journalism realm, there is a lot of good info in there – particularly on letting the images shine, not the web site.
Personally, I think Flash is a fantastic tool for interactive design. But it can also be slow to load and often the designers using it try to wrestle too much control away from the site’s viewers. Don’t do that. Let your pictures carry the page.