It'd be great to have folders (portfolios, subgalleries, directories; call 'em what you will) in the gallery. The flat namespace means that everything jumbled together -- my work, my wife's work, completed works, work in progress, sketches, etc.

It'd be really nice to be able to put a single piece in multiple folders (without multiple saved copies), but I'd just be *really* happy if I could have multiple folders.