For a while now I have been using the MG2 photo gallery application on okuda.ca.
Originally it was because MG2 uses only files for storage and doesn’t use a database. I did not have access to a database system (MySQL) on the host I was using. I also really like the MG2 interface. It is very simple and clean and I really like the look of the “rounded” skin.
I have since made a few minor modifications to MG2 to make it work a bit better for my purposes.
I can be contacted on the MG2 Support Forums at http://forum.minigal.dk/index.php as Poco. Feel free to PM me or leave comments here about anything MG2 related.