I have a post up at Let A Thousand Nations Bloom about how seasteading is the opposite of the Berlin Wall:
The Wall thus represented the brute force attempt of the USSR, purveyor of an inferior product, to lock-in its customers. It was literally, directly, physically a means of increasing the cost of switching government. Which makes seasteading, in a very real sense, the anti-Wall.
Also check out our link archipelago of the many posts around the web covering this historic anniversary.