Wired News is running an interesting piece
about Flickr's policy
which excludes images from being displayed in public areas of the site or global search results if more than half of the uploader's images are "non-photographic images." The rationale seems to be that when people come to Flickr they're looking for photos, not screenshots or other images. The policy has met opposition in particular from (you guessed it) Second Life users, who upload screenshots from the virtual world at a breathtaking rate, as well as illustrators. By primarily uploading non-photographic images, their accounts are flagged NIPSA, or Not in Public Site Areas. Flicrk co-founder Stewart Butterfield says revising the NIPSA policy is "in the top 10 percent" of things to do at Flickr, but there's no indication when a clearer policy will be in place.