I recently got an openmoko neo freerunner gps phone. The gps seems to work very well for mapping. I can walk around a small carpark (20 cars or so), and get straight edges with perfect corners. The sirf III was never that good for details.
Helge Hafting
Discussion
Comment from self on 8 November 2008 at 15:14
Which software / firmware are you using to do mapping on the freerunner?