A bit of a thread Hijack here...
I've been geocaching for a few years now. Recently my PDA which I used for geocaching broke. The Adventurer 2800 looks promising. My only reservation is there being no support for cache details. From reading various reviews and knowing MM works on a windows mobile PDA, is it possible to run other WinMob software to view cache details? The lack of cache details support may well be the killer that makes me choose a Garmin Dakota or Oregon.
To answer the original question :) , Geocaching gives you a GPX file if you're a premium member, which includes all the cache details and additional waypoints (if there are any). A LOC file gives you just the GC code and coordinates. You can get a GPX file containing up to 500 caches through a Pocket Query. From what I understand, you can load the GPX file into memory map on the PC and transfer the waypoints to your GPS (certainly can with Anquet).
I hope that helps and makes up for the hijack! And sorry for repeatedly mentioning the competition! :roll:
What details would you like to see?