IBM's Blue Gene/L supercomputers

IBM is moving steadily ahead with its Blue Gene/L project, with two prototypes of this new system finding spots on the list of the world's five hundred fastest supercomputers. While only in fourth and eighth place, with speeds of 13.8 and 8.7 teraflops respectively, they show that the final model has a good chance of coming in first the next time around. Plus the faster one is the size of about four refrigerators (we're guessing large refrigerators), while the current champ, the Earth Simulator requires a room 71 by 55 yards to hold it.
To put this in context, Blue Gene/L would fit in a New York apartment, while the Earth Simulator is almost as large as a football field.