what are onboard GPS solutions for the Blackberry? (Possibly vector!)
MGMaps - bitmap navigation, works very stable
Trekbuddy - i prefer MGMaps
GpsMid - vector onboard (!!!), very buggy/didnt work on BB last time I tried
WeTravel - ?
If by onboard, you mean storing maps on an SD card and not needing internet access to download maps in realtime, then TrekBuddy and Mobile GMaps are the only apps that I know of with that capability.
Nav4All is no longer available, but when it was available, it required a continuous data connection. I'm not familiar with WeTravel. As I posted above, TrekBuddy and Mobile GMaps are the only solutions that I know of.