  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 Photomultipliers (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 km^3 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.

Astrophysics