As soon as Apple announced iPhone 3G would feature GPS support a mental image of Nike + iPod sans the iPod came to my mind. About a month after the arrival of the iPhone App Store the first applications to keep track of your running workout are available:

* Path Tracker is an inexpensive tool to map your route and speed. iTunes link

* iTrail also looks promising. iTunes link

* RunKeeper is more sophisticated (and expensive; $10/8€) but doesn’t display a map with your track on the iPhone 3G. Instead it features a web dashboard to access your workout history and a Google Map.

MacRumors article / iTunes link