According to a trusted source, all nurses in Denmark now wear these MBT sandals at work. I bought a pair last time I was in Copenhagen, and they are my best sandal-buy to date. I haven't seen any MBT stores in the US, but I am sure there must be some. I would not buy them online, since the fitting and in-shop little training you receive (they teach you how to walk on a curved sole) are important. Expensive, yes. Pretty, no. But great for walking....
See:
http://www.swissmasaius.com/N