Version 1.20 added support for WRF 3 (namelist.input) and WPS 3 ("lat-lon" regional and global domains).
Version 1.22 adds some support for loading WPS .nc files into IDV and Google Earth. It is WRF Domain Wizard tutorial (9) on this page:http://wrfportal.org/flash-tutorial.html
This feature doesn't provide seamless support for (quickly) viewing WPS .nc files in Google Earth, but it will do the job.
Earth System Research Lab / NOAA / CIRA