Кто нить уже ставил, какие ощущения? Они вроде добавили поддержку sd.
ftp://ftp.openbsd.org/pub/OpenBSD/snapshots/zaurus/
появилась openbsd 4.1
для решившихся 
здесь есть готовые пакеты от энтузиазиста с oesf с ником zorg
http://www5.autistici.org/c0de/obsd/pkg4.1/
здесь есть готовые пакеты от энтузиазиста с oesf с ником zorghttp://www5.autistici.org/c0de/obsd/pkg4.1/
хотя теперь после выхода релиза наверно это не актуально
и можно брать с ftp://ftp.openbsd.org/OpenBSD/4.1/packages/arm/
если б не одно но
http://www.oesf.org/forums/index.php?showtopic=23732
>1. Do the original OpenBSD packages need to be recompiled in order to be used on >Z?
no they do not if you do not want speed optimization
from iamasmith there
http://www.oesf.org/forums/index.php?showtopic=17871
"On OpenBSD default build uses no xscale optimisation for the bulk of the executables - The Kernel is compiled with -mcpu=xscale but the rest of the distribution is compiled (for compatibility with other ARM architectures) with no optimisations. - It is possible to set some environment variables prior to build that will enable xscale optimisations and you get much better performance when you do this."
и можно брать с ftp://ftp.openbsd.org/OpenBSD/4.1/packages/arm/
если б не одно но
http://www.oesf.org/forums/index.php?showtopic=23732
>1. Do the original OpenBSD packages need to be recompiled in order to be used on >Z?
no they do not if you do not want speed optimization
from iamasmith there
http://www.oesf.org/forums/index.php?showtopic=17871
"On OpenBSD default build uses no xscale optimisation for the bulk of the executables - The Kernel is compiled with -mcpu=xscale but the rest of the distribution is compiled (for compatibility with other ARM architectures) with no optimisations. - It is possible to set some environment variables prior to build that will enable xscale optimisations and you get much better performance when you do this."