PSP GPS Device
PSP Updates has details of the first known GPS System up and running on a PSP. Looks like some hardware know-how is needed to get the bits together to link to your PSP, but its great work nonetheless, and shows just what creative minds can come up with.
I wonder if somebody will jump at the opportunity to commercially produce a GPS device for the PSP? Add in a car cradle and an map overlay for grid references and you’d probably have a decent chance of making a in-car navigation system.