From your Palm device open your browser and go to m.scout.me
This is a html5 web based navigation by Telenav that works directly from your browser and gives turn by turn directions and connects to your GPS, no need to install anything. What also is cool it will show events like concerts and other various things happening in your area, just tap on the "Discover" button and you can navigate to these places, or if you want to drive to a specific place just tap the drive button and type in the address or the name of the business, tap on the result and it takes you to a map so you navigate to your destination.
Some people may already known about this, but I just discovered it today and it is a godsend. I never liked the Navit app in preware, seemed a little to clunky and difficult to use. And if you own an unlocked Pre 2 it did not come with any Turn by Turn apps installed so this is a great alternative.