Some news, not that good but anyway news . I managed to compile and start execution of wesnoth on N900. Thanks to the great help Glen has given, after compilation all the campaings can be installed as a separate .deb as for Diablo. Unfortunately I've not yet managed to get rid of the segfault during the parsing of the font.conf file. After a chat with Glen it appears this is due to the missing dejavu font on Fremantle.. I'll now attempt to give it a shot and see if it works.

P.S. I've uploaded the debian folder to the official maemo Wesnoth project, but no debian packages so far.