Wirelessly posted (BlackBerry8830/4.2.2 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/105)

The same people who made the rules that electronic devices can never be used and can cause problems are now allowing WiFi on flights. I can assure you that the wire shielding has not changed on the planes between the initial policy and the new one. To suggest that the radio waves can be interfered with because more than one receiver is present is certainly entertaining, but not something that you would be able to document should you try.

The initial ban was because no one knew, and better safe than sorry. Now that there have been years of controlled testing and empirical evidence the old rules are just quaint.

To be VERY clear, there is no FAA/TSA/any other regulatory body rule that says GPS receivers are allowed or prohibited. It is up to the airline to decide using whatever reasoning they choose. If they choose to cite FAA rules they are not being wholly truthful. Everything else is just their perogative.