I just installed that version (the one compiled and packaged for the n810/n800) on my n900. It needed an additional tweak in form of a symlink from the new version of libsdl_gfx on the n900 to the old one widelands expects. After that widelands started. Although for some reason sound isn't working.

But the game runs, so it shouldn't be too hard to optify it a little bit and to make the sounds work (complains about not finding sound files). We'll see if i find the time to do so ...