Sony will be releasing the PSP GPS Receiver on December 7th. If you haven't already heard about the GPS feature, it is a satellite navigation system for the PSP, allowing you to pinpoint exactly where you are in the world, using your PSP! The GPS can also be used with PSP multiplayer games, which could potentially allow for awesome interactivity between players from all around the world. It weighs around 16g, measures 45 x 41 x 17mm (W x H x D) and goes directly into the USB port on your PSP.



The price is US$ 59.90 (about 30.70 GBP) and pre-orders can already be taken from Play-Asia.com. But sadly, Play-Asia does not ship to Europe (due to Sony's recent aggressive actions), so you European gamers will have to wait.

[Source]

At the moment there isn't much information, meaning some of this information might be slightly incorrect.