NOAA/ESRL/PSD Catalog http://www.esrl.noaa.gov/psd/thredds/catalog/Datasets/gpcp/catalog.html

Dataset Size Last Modified
     Folder  gpcp   --
         precip.mon.1979-2000.ltm.nc 750.6 Kbytes 2012-08-02T15:05:34Z
         precip.mon.1981-2010.ltm.nc 750.6 Kbytes 2012-08-02T15:05:34Z
         precip.mon.ltm.nc 750.6 Kbytes 2012-08-02T15:05:34Z
         precip.mon.mean.error.nc 17.01 Mbytes 2013-05-18T19:41:26Z
         precip.mon.mean.nc 17.01 Mbytes 2013-05-18T19:41:25Z

NOAA/ESRL/PSD at NOAA ESRL PSD see Info
THREDDS Data Server [Version 4.3.15 - 20121218.1126] Documentation