Not a residence, but pretty impressive. Architecture blog Y08 took notice of LOT-EK's new Puma City:

24 shipping containers are retrofitted and transformed into PUMA CITY, a transportable retail and event building that is traveling around the world...

The building is fully dismountable and travels on a cargo ship ... it will be assembled and disassembled a number of times...

(Hat tips: Treehugger, Jetson Green, ecosistema urbano)