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IceCube is a kilometer scale high-energy neutrino observatory, currently under construction at the South Pole. It is a photo-detector, using the deep Antarctic ice as detection medium for the Cherenkov photons induced by relativistic charged particles. These charged particles may be atmospheric muons or reaction products from neutrino interactions in the vicinity of the instrumented volume. The experiment searches for neutrinos originating in astrophysical sources, and can also detect neutrinos from WIMP interaction in the Sun or Earth. In the last two austral summers, 9 in-ice strings and 16 surface IceTop stations (out of up to 80 planned) were successfully deployed, and the detector has been taking data ever since. In this proceedings, IceCube design, present status, performance and dark matter detection sensitivities will be discussed.

The Antarctic Muon And Neutrino Detector Array (AMANDA) has been taking data since 2000 and its data acquisition system was upgraded in January 2003 to read out the complete digitized waveforms from the buried Photo-multipliers (PMTs) using Transient Waveform Recorders (TWR). This system currently runs in parallel with the standard AMANDA data acquisition system. Once AMANDA is incorporated into the 1 km³ detector IceCube, only the TWR system will be kept. We report results from a first atmospheric neutrino analysis on data collected in 2003 with TWR. Good agreement in event rate and angular distribution verify the performance of the TWR system. A search of the northern hemisphere for localized event clusters shows no statistically significant excess, thus a flux limit is calculated, which is in full agreement with previous results based on the standard AMANDA data acquisition system. We also update the status of a search for diffusely distributed neutrinos with ultra high energy (UHE) using data collected by the TWR system.

IceCube is a high energy (E ≳ TeV) neutrino telescope currently under construction at the South Pole. The final instrumented volume will be approximately 1 km³ and the complementing surface array (IceTop) will be 1 km² in area. The main objective of IceCube is the search for extraterrestrial sources of high energy neutrinos. IceCube's prototype detector (AMANDA) produced data sets starting in 1997. These have been analyzed in the search for high-energy neutrinos from diffuse and point sources. AMANDA has also performed searches for Dark Matter accumulated in the center of the Earth and the Sun and for relativistic magnetic monopoles. This papers reports the implications of the AMANDA searches and reports on the status of IceCube construction.

IceCube is a neutrino telescope currently under construction at the geographical S. Pole. It will be a cubic kilometer size by 2011 when complete. So far IceCube has been successful in both deploying strings and taking data with its partial detector together with its predecessor, AMANDA. Its performance was well verified as it was originally designed. Here we present some interesting recent results from IceCube and AMANDA: point source search, GRB080319B, indirect dark matter search, magnetic monopole search and search for violation of Lorentz invariance. The IceCube deep core which will consist of 6 special strings is expected to improve low energy physics of IceCube such as indirect dark matter search.