I just think this is neat. I have no current plans to build or buy one.
There is a glut of standard shipping containers in the US because we import more than we export. You can often find these containers at around $1800 each, both 20' and 40' sizes. McKinney in Seattle will even customize them for you.
Lots of container housing projects.
Global Portable Buildings sell prebuilt human habitable cargo containers; one newsclip I saw suggested they go for under $8000. Hookup power/water/waste and live!
An expandable container 'house'
