To get "Where Am I" functionality on a Treo without the triangulation stack the Centro's have, you can use "Where Am I?" from http://wfmh.org.pl/carlos/ which is a small application that works with a BT GPS unit. It will get the coordinates from the GPS unit and plug them into Google maps.
The latest version is apparently 1.8, although Carlos admits he hasn't got the download link working yet. I used 1.7 today together with my Garmin Mobile 10 unit on the latest version of Google Maps and a Treo 755p and it worked like a charm. The principle advantage to this methodology is that I don't need to: (1) run Garmin Mobile XT; and (2) switch out my SD card to the SD card with the Garmin maps on it. Pretty cool. Harold [Non-text portions of this message have been removed]
