Here in Melbourne we can't built houses quick enough to accommodate the expanding population of our city and that has caused housing prices to sky rocket (among other things). An evening TV program had a special report on that topic last night and one of the solutions was prefabricated homes that can be delivered on the back of a truck within one week and set up. And I thought "but who would want to live in one of those houses if they had a choice? I would!!" These pre-fab homes in particular are really well designed and built as "green" as possible. The impressive thing about the homes is that they can be added on to later - just order the extra room or that guest house that you've always wanted and it will be on your doorstep in 2 days, literally. Here are some pictures of the pre-fab Modscape homes. The company is also in Europe and Scandinavia and it sounds like they're selling like hot cakes up there.
all images visa Modscape. You can browse their website here and look at all the smart floor plans or choose a custom floor plan.