http://www8.garmin.com/support/download_details.jsp?id=4051
Software from 2.2 to 2.3
GPS software to 2.48
List of changes
Change History
Changes made from version 2.20 to 2.30:
* Added the ability to control the scale of the x and y axes of elevation plot . Tap the x-axis legend to zoom the x-axis. Tap the y-axis legend to zoom the y-axis
* Added panning and zooming to the image viewer
* Added ability to set position after pressing the go button when GPS is in Demo Mode
* Added option to add a point from the map in Route Planner
* Added option to search near a point on the map in Where To?
* Added preview of on-road routes in Route Planner
* Added option to save a geocaches as a waypoint
* Added error message when the maximum number of geocaches is exceeded (2000)
* Added error message when the maximum number of gpx files is exceeded (200)
* Added option to clear the current track from Track Manager
* Added support for downloading geocaches written using Groundspeak v1.1 extentions
* Added elevation plot type to user profiles
* Improved GPS performance
* Improved map drawing performance in some situations
* Improved handling of naming a waypoint the same as an existing waypoint
* Improved feedback when typing an invalid character into the keyboard
* Improved display of intermittent water areas
* Fixed 3D View not showing detail from supplemental maps
* Fixed 3D View occasionally not showing anything
* Fixed waypoint and geocache symbols not updating on the map after being changed
* Fixed Custom POIs not being removed from Recent Finds after the Custom POI database was deleted
* Fixed being unable to pan or zoom when reviewing a route
* Fixed issues with Cyrillic characters
* Fixed issue where the Oregon would temporally stop responding after a spell search
* Fixed issue where left map data field could get stuck on depth
* Fixed creating invalid gpx files after projecting a waypoint
* Fixed city coloring with CityNav 2009
* Fixed map getting stuck in north up mode after panning
* Fixed geocaches without names not being in the geocaches list