Hi
I just realized that RIM has ported SDL to BlackBerry Playbook. Does Simutrans have any other dependencies? RIM has already included libpng and zlib in their NDK.
list of libraries supported by RIM:
https://bdsc.webapps.blackberry.com/native/documentation/com.qnx.doc.native_sdk.devguide/com.qnx.doc.native_sdk.devguide/topic/libraries.html
Simutrans needs bzlib for the savegames. It should be possible to compile without bzlib, but then you cannot read savegames by others.