On my personal site I have alot of categories - mostly family photos and such. But, using the gallery layout option, my page was getting pretty big - you'd have to scroll down two or three pages to see everything.
So, I got to thinking, what if I could seperate out these into "pages". I know Steve once asked about this a while back, but I never really came up with a concept until now.
The Admin Options have a setting "how many top levels do you want to display per page" and if you leave it at 0, PhotoPost works the same. If you input something else than that determines how many top levels per page are displayed - in my case I'm displaying just 1.
I've been mucking around with some settings - like showing Members Gallery always on page 1 if people have view permissions (same with Most Recent, etc).
Anyhoo, I'm still messing around with it (in case it looks funny when you are checking it out); but I think there is some potential with this feature.