Sony Computer Entertainment Europe have introduced an incentive program to encourage users to "upgrade" to PSPgo. They’re offering free downloads of any three games from a list of 17.
The catch is that you need to register your PSPgo on PSN, then log in to the network with your old PSP while there’s a UMD in its drive. This allows you to download a special PSPgo theme and gives you a voucher that will allow you to download your three free titles. For people in Europe, this essentially means four free games, since SCEE are offering Gran Turismo PSP free with every PSPgo (while SCEA is bundling GT PSP with PSP-3000) for early adopters.
The "Rewards" program will be in effect October 1- March 31, 2010. Here’s the list of 17 games: