The additional meta-data for the pictures will be quite useful for using the photo-album to organize your pictures, but I have a suggestion that involves improving the display for visitors: Provide a capability to specify and alter the order in which the pictures are displayed. The simplest way might be to add a 'sort_order' column to the table which would hold real numbers which, when sorted, would specify the display order. It would default to the order of entry into the table, i.e. it could be initialized to be the photo ID number.
The complicated part would be the web form interaction required to allow a user to alter the display order.
