If you're thinking side-story type stuff, we're definitely open to suggestions and ideas. As far as what zones are available or in-use, I suggest either posting, or PMing one of the staff with the list of zones you are thinking of, and we can work from there.
We do have a list of zones that are planned for use, as well as ones that are already in use, but we will not make that list public, other than once the zone is open and allowing players to enter/discover it on their own. Players may post their own list of zones they have discovered if they wish and we highly encourage this kind of information sharing.