  The excellent radio frequency transparency of cold polar ice, combined with
the coherent Cherenkov emission produced by neutrino-induced showers when
viewed at wavelengths longer than a few centimeters, has spurred considerable
interest in a large-scale radio-wave neutrino detector array.
  The AURA (Askaryan Under-ice Radio Array) experimental effort, within the
IceCube collaboration, seeks to take advantage of the opportunity presented by
IceCube drilling through 2010 to establish the radio frequency technology
needed to achieve 100-1000 km^3 effective volumes.
  In the 2006-2007 Austral summer 3 deep in-ice radio frequency (RF) clusters
were deployed at depths of 1300m and 300m on top of the IceCube strings.
Additional 3 clusters will be deployed in the Austral summer of 2008-2009.
Verification and calibration results from the current deployed clusters are
presented, and the detector design and performances are discussed. Augmentation
of IceCube with large-scale 1000km^3sr radio and acoustic arrays would extend
the physics reach of IceCube into the EeV-ZeV regime and offer substantial
technological redundancy.
