Hello, I found interesting link:
http://jdolan.dyndns.org/trac/wiki/Quetoo

Quetoo is a Quake2-compatible game engine for GNU/Linux and FreeBSD. It's focus is simplicity, security, stability, and speed. It contains critical security updates for both clients and servers, bandwidth saving network protocol enhancements, an improved console, and some major speed increases. Quetoo is up to 140% faster than stock Quake2.
....

It runs incredibly well on nokia N800:
http://www.youtube.com/watch?v=jPh2Os0D8pY&eurl=

Looks very interesting - anyone able to give it a go?

im downloading it now, though i find a 1.7mb full source code a bit hard to handle ...

[update]

make seems to be going well on my x86 now that i have mesa and sdl installed.

well i finally got my x86 deskotop to the point it could run it, such that for it , i put on nvidia, sdl/glx , mesa(opengl), dri/drm, libdrm ...

only thing is now i need the full commercial quake 2 , comnig soon ...

sh-3.00# quetoo
Quetoo 0.6.1
Using /root/.quake2/baseq2/ for writing.
couldn't exec quetoo.cfg
Console initialized.
Sound initialization..
Sound initialized 16bit 48KHz 2ch.
Video initialization..
GL_EXT_compiled_vertex_array
GL_ARB_multitexture
********************
ERROR: Couldn't load pics/colormap.pcx
********************
Error: Error during initialization
sh-3.00#

I'll give it a shot on pdaXrom (for 2.6-based releases).

It's built, but not tested, and in the new packages thread.

What data would you use to play? Are there any good total conversion mods to use/free data?

That's probably a REALLY dumb question.

AFAIK you need full q2 files

And it's only the Quake engines that got open-sourced?

?? (Amd) ??

I was wondering the same thing... but I think he meant "and"

Late

Yes, you need q2 data file to play. Shareware data is floating on the Internet, but it is not so easy fo find by qick googling.
I tried compiled quetoo on pdaXii3, but getting "X11 is not confirured for OpenGL" error. I have also installed mesa3d, glxgears demo is working fine.
That is really pitty, q2 is almost playable with standard q2 engine.