One of the new big features of 3.0 is, IIRC, the ability for iPhone apps to utilize third party hardware attached to the dock connector. I'm sure if there's any way for GPS data to be sent out through the dock connector, someone will promptly create and market an adapter that converts it to NMEA.My only complaint with using iPhone gps is that there is no connector available to hook up the phone to a VHS radio for EPIRB. I've asked the "geniuses" at the Mac store about this and you can only imagine the dumb looks I get.