Just a webpage or sorts that can show you stats on every island, even those numbered ones I hear about, it could show island rating, level, visitor count (wk/month/lifetime) that co2 emission thing I saw on the server.
You could also have an ingame button to upload a live "snapshot" of the island's image from a birds eye view to upload to the site and even possibly have an island history of past images.
Maybe even comments for the islands? But that's more than just data I suppose :)