I am currently trying to get my head around Wayfinder on the p800. I don't want to put you off but I would suggest that you should be comfortable with configuring GPRS connections on mobile phones before you invest in any of the gear. Wayfinder looks excellent in my opinion but I have had issues with my mobile network provider which I think have contributed to my problems. There are some excellent reviews around (pocketgps.co.uk) which says that the mobile phone based systems are good but I'll need to reserve my opinion until I've got it working
