>>Going deeper, you may want to address each individual cell of his body, you may need few levels more (organ, tissue, cell ID). And that's it - unless you want to address an individual atom in the known universe.
>
>IPv6 offers ~3.4E28 addresses, or about 5E28 addresses for each living human. An average human has about 7E27 atoms, so IPv6 offers about 7 addresses per atom for every human.
>
>Clearly, though, this won't scale up to even planetary frames, let alone solar-system, galactic or universal ones < g >

Dang, just when we were so close. The same cheapskates who got us into the Y10K problem just couldn't have the far sight to go straight to ipv8. They'll never learn... or maybe after the fifth BigBang|giBgnaB cycle someone will.