I haven't written this up yet.
Soon, I'll write up the city of Megalopolis.
Other parts of the world may or may not follow thereafter. We'll see how it goes.
The name Va is used for the world because (pay careful attention)
Note that Coba is the same world as Va. This does not stop sages listing them separately when they enumerate the Fifty Worlds. Coba is the old name for the world, and is used for the part of the world which used to be populous but is now virtually deserted. Va is the new name for the world, and is used for the part of the world around the city of Megalopolis. It is practically impossible to travel between Coba and Va, so for most practical purposes they are indeed separate worlds.
I have no plans to write up the worlds of A or Ga. As far as I'm concerned, they're uninhabited.
Va has two moons. I'll add more about them later.