I have it working...at least the demo wad file...haven't been able to get doom2 to work right yet.
To get it to work I installed the following ipkgs:
prboom_2.2.3-2_arm.ipk
doomdemo_1.8a_arm.ipk
libSDL_1.2.6cvs-1_arm.ipk
libSDL-mixer_1.2.5cvs-1_armk.ipk
libSDL-net_1.2.5cvs-1_arm.ipk
timidity (guspat-20000706-required.tar.gz)
Setup the lib/share paths for timidity in /usr/local/
I installed the timidity stuff on /mnt/card/.timidity and
made a link to it:
ln -s /mnt/card/.timidity /usr/local/lib/timidity
ln -s /mnt/card/.timidity /usr/local/share/timidity
(The MIDI sound stuff takes up alot of space, 18M.)
I also installed the wad files in /mnt/card/QtPalmtop/share/games/doom/
See this page it is very helpful:
http://cmisip.home.insightbb.com/zaurus.htm