I wish Sony would release maps of North America; even if it was by region (maybe Time Zone? or "North East, North America; or by states). MapThis works great, but its a pain since the map data (depending on the Zoom level, area size, and detail) can easily fill an entire 4gb memstick.
And sadly, MapThis doesn't support on the fly route calculation
There are maps for Japan already. When Sony launched the GPS device in Japan, they released the Japan Maps UMD.
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