I am the maintainer of the Photo Gallery plugin for Movable Type. It originally started with me creating a plugin to simply automate the installation of Doug Bowman's amazing photo gallery templates for Movable Type and slowly evolved from there.
However, Doug's templates were designed in the Movable Type 3.x era. I have tried to maintain them, but truth be told, they are simply too complex and arcane, even for me. It is not that I can't so much as I have so many other things I would rather be doing. So the Photo Gallery plugin remained in a barely working state for ages, and my own galleries fell into neglect - much to the dismay of Harper's grand parents.
So I embarked on a simple redux of Jim's Mid-Century Template Set to make it work with photos exclusively, and within the next couple of days or so, I will make my modifications publicly available. In the meantime, I am weighing what to do with Doug's old Stop Design galleries and working to improve photo uploading, and so on.
Tell me what you think and let me know if you are interesting in testing the new template set out!