I just found out that with FUGAWI GPS Software, if you open up any map, select the "?" tool, and click on a spot, a Geocaching submenu appears. Selecting this will provide a list of all the Geocaches near the point clicked on (from Geocaching.com).
Also caches can be downloaded (LOC Files) and are automatically imported into FUGAWI, from where one can upload to GPS.
They don't seem to be advertising this feature though - its hidden...
see: www.fugawi.com
- John