A couple of tweaks maybe worth considering.....
1) A "full screen" option
2) Is it possible to show pics via lightbox on iPad and iPhone ?
It currently opens a new safari window and you have to navigate back to the other window.
3) It would be truly awesome if users could create their own gallery nodes, with the ability to set permissions to either "anonymous" or "all site users" or "all followers" or even site usergroups which they are members of.
Taking it to another level, would be for users to be able to create their own custom groups of users and only share photo's with their own specific user groups.