Withing five minutes, I got Plogger running on my machine. In another hour, I created a new theme with different visualization (CoverFlow) to display thumbnails.
Having worked many different photo gallery management software/scripts, I find, Plogger is the most beautiful. I might be ignorant about other better systems, please share if you know.
I bet, web designers would find it very handy because they can easily customize and deliver solutions without dealing with complex programming required behind file upload/management.