Oceangram. Put messages in bottles and throw them into the ocean. Wait for messages in bottles to arrive from other shores.
That’s pretty much it, really. Except that, in spite of the lack of non-virtual bottles or non-virtual water, it’s oddly compelling. (Link by way of quietspaces.)
Meanwhile, on a completely unrelated note, Hermione Granger, the Pirate Queen. Because when you’re born on Talk Like a Pirate Day, that can’t be mere coincidence, can it?