Here's an interesting new app I discovered today. It's called GPSed, and basically it allows you to Map your 'GPS Tracks' from your GPS enabled Berry.
Looks like GPSed is very compatible with the BlackBerry. On their download page you can download the mobile application for everything from the 8830 to the 5810!? Really! Check it out! (And if anyone out there has a 5810 I want to know whether this works on it!!!)
I'm assuming the GPS functionality of the app will only work properly on devices with GPS (duh!). My 8800 seems to do the trick.