Navit is a feasible alternative. I found it painful to setup but it's working well now.
where were you able to get Polnav to try out? I went to thier site and couldn't find a download/purchase link anywhere...
Nasa,please check PM,download link for trial version
I used to be an active map developer for Indonesian community maps.
I am still in touch with some senior mappers,that's how i got a trial version
You guys might want to check this sites out.
I am ordering from Taiwan,however it will take a month (Chinese New Year there)
Hopefully,there are some interest in this gps application,so somebody here in MP3Car would be able to integrate it
onto RR,CF or even Linux one.
I don't know how?