I have vague but passionate dreams about having icon galleries be some kind of a subset of image hosting galleries in such a way that you'll be able to "swap out" icon sets with one click and preserve keywords/comments/descriptions/etc so you only have to do it once per set and can then, like, change your icon sets for a holiday or an event or something and then switch back afterwards without having to reupload every.single.damn.one.

Oh my gods. I didn't know how badly I wanted this until you posted this. Yes. THIS. PLEASE. (Pardon my capslock!)