For sure.

I'd also recommend including the possibility to save and load routings. Until a local routing search is implemented, this would at least partially enable you to route abroad, without incurring monstrous costs. I.e. you're planning a vacation in some city, you know you're gonna have to drive to some place and back, for instance, so you do the routing where you have free access, and then save it, and then do other routes and save them, and then when you need them, you load them.

Come to think of it, what would be great is if you'd include the possibility to download tiles around the route for a couple of levels. I.e. now you can do it around a point, but if you know where you'd be going, you could just download around the route within say a couple of hundred meters, and that way you could also prepare for a trip. This'd definitely be great help again when abroad.

You're my hero man, for programming this. Before you, there was only navit as means for free (as in freedom) navigation software, and it sucks bigtime, segfaulting and all. Modrana is a great breakthrough for the free software world...