Maemo Mapper works for some things, but my problem is that its mapping portion is essentially a glorified image viewer. The maps are all tiles of raster images, so cannot be routed (the online service it can link to doesn't really count). Its functionality is similar to Wayfinder without the navigation service, except a bit faster and without the nice searchable POI database. (And a choice of maps, meaning you are bound to find a good one for your area).
Don't get me wrong, I definitely see why some people like Maemo Mapper, since there is more to these things than just routing. It does GPS tracking nicely - super helpful for OpenStreetMap stuff. Lots of other software like GPXView and OpenStreetMap2Go plugs in to it with good results.

However, it does not fill every need under the sun.
Navit uses vectors and can generate routes nicely, and there is hope for a solid version of it on the N810

I think it's pretty low that WayFinder already has all the right maps and things downloaded for free, but you need a subscription fee for access to a feature that happens entirely on the client side. They rely on those subscriptions to pay for the maps downloaded by free users.
I don't know about you, but to me that sounds mighty stupid. Time for a new business model.