PartFoundryhave updated their site with news that the iPhone pluggin GPS module will ship in February...

"The iphone locoGPS module allows jail broken iphones to finally have GPS functionality. This module is in development and will be shipping in February. All software is open source and more applications are being written every day. The locoGPS module gives you the ability to explore all the benefits of GPS from a device that is small enough to put on a keychain...

partfoundry.com