As it is now, as the admin, I get to decide what islands are available, and where they go....if the users can disable the right or left column and so forth....
But, I got to thinking about people being able to create their own layouts....what about have an admin option that allows us to pass on the options to the users, so that if enabled, the users will get a listing of island content that's been enabled, and they can choose which ones they want to see, and where it will go (left, right, 1,2,3, etc)
Maybe an admin option to force or mandate that a particular island has to be at a particular spot (would only really work for the 1 position I guess, or 1,2) but I think it'd be pretty cool.