wayfinder should not be crashing on the 8100. if it is please email their support. I have be dialoging with them re the releases. I have pretty much outlined the issues at my tips page. They are using the same map source as BBMaps which I beleive is TeleAtlas.

Telenav has better POI's in the US but the interface for routing is not as good IMO because you can't easily change views from turn by turn instructions to navigation map to route on map like Wayfinder can. These views are very useful IMO.