Here is a modified version of John Costigan's Maemo-Mapper v1.1 with a second set of URI/Cache, e.g. for easy switching between street maps and satellite images. The ESC-hardware-key now toggles the URI/Cache settings, while in the original version it toggles show/hide tracks.

The modified version also has the option to operate with closed device cover: you can disable the default behaviour to disconnect the bluetooth GPS connection when the cover is closed, if you unset 'Tools' -> 'Control Panel' -> Connectivity' -> 'Disconnect when cover on device' (Gconf-Key /system/osso/connectivity/IAP/disconnect_on_cover).

John's Maemo-Mapper focuses on in-car navigation. My modifications are useful for non-car navigation, e.g. while cycling, hiking, walking, running: satellite images are sometimes (but not always ;-) more useful than street maps for off-road navigation, operation with closed device cover is useful if you temporarily store the device in a pocket, but still want to record your track.

Before I already applied these modifications to version 1.0.1, now I ported my modifications to the current version 1.1.

Modified package:
http://armin-warda.de/maemo-mapper_1.1-aw-4_armel.deb

Source patches:
http://armin-warda.de/maemo-mapper-1.1-aw-1.patch
http://armin-warda.de/maemo-mapper-1.1-aw-2.patch
http://armin-warda.de/maemo-mapper-1.1-aw-3.patch
http://armin-warda.de/maemo-mapper-1.1-aw-4.patch

Modified source:
http://armin-warda.de/maemo-mapper-1.1-aw-4.c