This is just a half-baked thought that occurred when I saw a long string of photos in a forum thread.
If you ever run out of m ore important things to do (maybe Winter 2099), consider a variation on lightboxes.
Lightboxes with captions.
Maybe, after upload starts, a dialog could pop up offering to add a 60-character caption. Then, while someone is waiting for the image to upload to ATP, he or she could type in a name or comment for the image.
