Top500.org have just released their updated list of the worlds most powerful supercomputers. In June all of the top 5 were in the US, now only 2 are, with India, Sweden and Germany appearing.Here's an interesting thing, you can make it into this list for less than the cost of a family house in Manhattan.The fact that a Swedish Military computer is at number 5 indicates that either the Swedish military require the world's most powerful computers, or they are just unusually unsecretive, and that there are many machines we don't know about.Here are the top 15, with pictures of the actual machines, where they have been built. Although the IBM Blue Gene has a simple and striking case, only the Barcelona Computer Center and Leibniz Rechenzentrum are contained in rooms that are at all impressive. Vote for which ones you think are worthy of note.