Earlier this month NERSC received the first installment of its new Cray XT4 supercomputer. The delivery of 3,336 computational dual core nodes marks the start of the installation of the full system later this summer. From NERSC (links to PDF including pics of the new machine):
Named “Franklin” after Benjamin Franklin, America’s first scientist, the Cray XT4 will consist of more than 19,000, processor cores when fully installed. It will deliver sustained performance of at least 16 trillion calculations per second, with a theoretical peak speed of more than 100 teraflop/s. Franklin the computer was powered up for the first time on January 17, thus celebrating its birthday with Benjamin Franklin, who was born January 17, 1706.