Finally after all the wait Orange Gadgets is preparing to release the first GPS plug-in for the first gen iPhone.
Included with the GPS module is a 6ft USB-A to micro USB-B cable for on-the-go or at home charging. With this cable you will be able to charge your iPhone or iPod touch while the module is plugged into your handheld device. A suitable USB car charger, USB wall charger or USB desktop/laptop port is required for this functionality (not included). The cable and the GPS device come together for the price of $75 + shipping.
It appears the GPS module will communicate with a 3rd party app along with google maps if the images on their site are any indication. It is currently not clear whether or not you need to have a jailbroken phone to use the GPS module but if I were to take a shot in the dark I’d say probably yes.