Here are some interesting links to follow up on using shipping containers as housing.
Regularly updated website on building with containers
Images of containers as houses
Container rooms – SCF Group, SA (pdf)
32 container houses
Future Shack – Sean Godsell, architect
12 amazing container houses
Container house designs
Containers for sale
Videos of container homes
BYO – Build your own housing
Wikipedia on US container housing
Has anyone actually done it?