Choice of display
These are just extra minor enhancements and I'm not sure if this has been mentioned before, but what about allowing the viewer to have the capability to be able to switch between viewing "just thumbnails" (like an image contact sheet) or "thumbnails w/info"
I know we can select which info details are shown from within admin, but this is more like an on & off switch that is user selectable at the time of viewing.
And additionally, perhaps make the info details box on the enlarged picture detail page have the capability to collapse and then have a viewer preference default option that could be selected in user options to be able choose to show the info details collapsed as a default.
I personally prefer not to see the info detail boxes right under the photos when I am browsing as I think it takes away from the actual impact of the pictures, but yet it would be nice to still have the choice to be able to see them if I wanted to.