Defeating piracy the Tropico way.
I actually hadn't known about this until a friend in IRC mentioned it.
Tropico 3 wasn't available to him, and wasn't scheduled for a UK release until Nov. 6th. He went ahead and downloaded the game off some P2P tracker or another, and when he launched it it asked for a serial. It then also had a link to buy the serial key online, which took him to a site that offered a Tropico 3 license key for cheaper than the full game. Within a minute he had turned his pirate copy into a legit copy.
If that isn't a brilliant way of recouping the real 'lost sales' from piracy, I don't know what is.