I've tried both the new CoPilot bluetooth modem and the GlobalSat. They both worked well and I can recommend them without problem. The CoPilot can be had for about $199 and it's tiny, fast and can also work with a bluetooth enabled palm pilot or clie. www.alk.com The Globalsat is more expensive. I got it on ebay. The problem is finding programs that can use it on the Mac. Personally, Im running VirtualPC and a program called Destinator which works very well and the maps that come with it are very accurate. I assign a serial port with the bluetooth serial utility and Virtual PC just sees it as COM1 Enjoy!! Dick Grable wrote: > Does anyone know of a GPS unit that works with a TiBook? If not then my next > choice is the Street Pilot III and finally a product called Handspring Trio > 'Mouse'. Any information would be appreciated.