This is excellent news. I'm a geocaching.com lurker and although I don't own a GPS unit right now I think it's fantastic to see people working on native OS X GPS software. Good luck and please keep us updated on your progress. Maybe Steve will be announcing an iGPS at Macworld next week. 20GB drive, MP3 player, all the latest and greatest GPS features, handwriting recognition, wireless internet access for accessing geocaching.com while you're on a hunt, about the size of an etrex and much, much more.