OK,
I'm not specifying which OS is better, and this solution would work for both. This is a COMPLETELY automated solution to get your *.GPX file on your Palm or PPC in a usable format.
It's QUITE elaborate, but here's what I do:
1) I request a GPX query, as normal.
2) I have a rule in MS Outlook that automatically detaches the message (Look for this software: EZDetach - www.ezdetach.com) Ezdetach allows you to automatically save an attachment then execute a batch file or program file after the file has been saved. It can also remove the attachment, leaving a link instead, saving you LOTS of space in your *.PST files.
3) I then throw it through GPX Spinner (www.gpxspinner.com). This turns the *.GPX into a complete HTML document set, viewable by any browser.
4) I also use Watcher (www.clayjar.com), this allows you to remove and alter waypoints in your final PDA and your GPS uploads.
5) Run it through iSilo. (www.isilo.com) Converts HTML to a single, compressed, Isilo PDA document. Mobipocket, for me has been terrible, piggy, crashing piece of software. Isilo will work for both PDA & PPC, there are quite a few programs to do the same thing as I understand. You will also need to get the reader for your PDA too.
Just try GPX Spinner and open up the document structure with your favorite browser, the indexing works, it's small, and it's quick. Then you'll see that it's worth the effort to figure out iSilo.
Everytime I receive a new *.GPX file it's ready on the next hotsync of my PDA. It's got adjusted coordinates, removes the ones I'm not interested in. The best thing about GPX Spinner is that it changes the waypoint names and pictures depending on the type, status of the cache. So just looking at your GPS will help you figure out what kind of cache it is and if it's been found lately. This is completely configurable.
I'm working on a how to, but I'm already into hour 4 of the graphic instructions for it. But it's well worth it to try.
Bob