Icecube - A Telescope to Map the Neutrino Sky

IceCube is a neutrino telescope under construction at the South Pole. When finished it will encompass a cubic kilometer of ice residing 1500 m below the surface of the Antarctic ice sheet It is designed to discover and map the sources of high-energy neutrinos in the northern hemisphere. By February 2007, shortly after the Conference in Cocoyoc, there were 22 strings (of the 70+ envisioned), each with 60 photomultiplier tubes, working in the deep ice. The performance of the IceCube array with up to nine strings and some results from IceCube's predecessor, AMANDA (the Antarctic Muon and Neutrino Detector Array), are described here.