[CODKill]

I have recently been looking for the best navigation software for my touch. I know as of right now there isn't an internal GPS working until Rev. A, but I might look into a bluetooth GPS receiver. As I look all over this site at navigation programs, I am getting more and more confused. I have seen the TomTom mobile software, which I'm not sure if it works with the touch. (Please tell me if it does) And also if that has maps with it? I guess what I'm wondering how all of that works. Do I need to get a map file as well as the software from the same company? Or do map files work with any program? And which programs do you think are the best with which map files? Thanks for your help.

And one other thing, what is DACH? I've seen that on most of the navigation threads here for maps.