Dump your Garmin! No, I don't mean getting rid of your Garmin, so don't go chucking it out the window just yet. I'm referring to dumping the data from the .gpx file your Garmin device utilizes to store location and route information.
A co-worker of mine recently asked me to write an app that reads a Garmin's .gpx file and displays the waypoints and the route on a map. Never having seen a .gpx file (I'm a TomTom boy, myself) I was pretty sure it would include all the basics - lat/lng, name, etc, etc. I found what I was expecting in the file, not much to it, it's fairly simple.
You can view the sample app here. Viewsource is enabled on the sample so you can see the code involved in it. To sum it up, I used an HTTPService to read the file, array collections (I know they're heavy and slow, but they're easy), and looped through the collections displaying the waypoints and route on the map. If you're at all familiar with placing POIs and routes on MapQuest's maps, the whole process is fairly simple.One other thing: On MapQuest.com, by using the Garmin Communicator Plug-in, you can output map and directions info into a .gpx format using the "Send to GPS" option in the "Send To" menu.
Hope this helps some one! If you threw your Garmin out the window in the first paragraph, neither MapQuest nor I are responsible.