I use the Remote File module for a cck field displaying a remote image. It works with a known issue: images are reloaded on every edit http://drupal.org/node/395256
And as i do tests with lots of nodes and delete them afterwards, the images cached in filesystem become deleted too. Is there a way to tell filefield(?) not to delete them?
edit
Meanwhile found http://drupal.org/project/filefield_sources which works very nice on manually created or edited nodes. But there is no way to make filefield fetch the image on assigning the url to the place where it shows up when i let print_r($node) show it to me.
See also my post to this (wont-fix)issue http://drupal.org/node/590756#comment-2774472