I run a moderately sized gallery over at http://www.animegalleries.net
, currently using a coppermine 1.2 install. A fairly heavily customized install, so much so, that I think it would be almost as hard to upgrade coppermine, as to switch to a new system, and so I am looking at my options.
One of the things I like though, is how the main page looks, with the category/album structure being as it is. How hard would it be to customize the PhotoPost script to emulate that look for the home page?