Royale has posted an update to his maps app for the PSP:

Here is an attempt to bring Google Maps to the PSP with a simple interface.
This program is not using the Google Maps API (except for address search), it is retrieving the images directly.

Download: PSP-Maps-1.2-fw3x.zip
Unzip and install in your PSP firmware 3.x folder.
For custom firmwares 3.90, please also try PSP/GAME380 folder.
This package also includes a GP2X version!

Controls:
Digital pad: move the map.
Analog pad: move smoothly the map.
R button: zoom in.
L button: zoom out.
X button: next view.
[] button: previous view.
/\ button: go to address.
O button: show/hide informations.
Start: menu.

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