If there's one thing J2O needs, it's notifications. Let's not go too far as to make it a social networking experience, but I'd love a box on one of the margins of the homepage that says "x New Review(s)!" and "x New Picture Comments(s)!", et cetera, et cetera. It'd be great to be able to be notified if something you uploaded like eight years ago happened to get a random review, even if it's a quick review or a comment.