Exciting! Hooray pretty subalbums
Wasn't sure to what extent you wanted admin interface suggestions/observations since subalbum options didn't appear to be implemented in the build I exported, so here's what (little) I noticed outside of that:
- Album descriptions for thin images (i'm guessing less than 50% width) appear to the right of the image instead of underneath in the default sub-albums theme. Probably a quick fix with a div or p/br.
- I had an initial blip (I didn't have perms set correctly for the cache dir) where when I drill down to a single image, the "next" link points to the parent album (w/o pagination) and there is no "previous" link visible. It's the same regardless if the image is the first, second, or last in the set. Blip though, because I can't seem to recreate the problem with subsequent albums and all manner of permissions-changing directory-moving futzing that I could think of, but I thought i'd mention it in case anyone else comes across the same issue.
Outside of those two issues, everything seems to be working very smoothly

Albums navigate as you'd expect, URLs are pretty... it just works

Great stuff!