Benjamin Zores is writing about porting GeeXboX for N900 called: Enna

"Enna is a Media Center application. Featuring a simple user interface, Enna is based on the powerful Enlightenment Foundations Libraries (EFL) as for its graphical user interface and GeeXboX libraries as for multimedia playback and information retrieval."

"There are still room for way more optimizations. Enna has been ported, that’s a fact. The underlying dependencies can however be improved a lot. The EFL can use either X11 or OpenGL for output. Right now, we’re still using plain X11. It’s not really optimized but I’m not yet fully convinced of the OpenGL|ES port so it’ll stay this way for a still a while. Also, libplayer on N900 has been configured to use MPlayer. While this perfectly works, it uses CPU (with all possible ARM VFP and NEON optimizations though) for software decoding instead of using the hardware DSP. As a result, it can decode much more audio and video formats than the default embedded played allows to, but it’s also slower. I have multiple possibilities to make use of this DSP (through Maemo MAFW video API or using OpenMAX) and have not yet settled my choice."

if you want to download it, you have to add a new repository in app manager:

• Name: GeeXboX
• URL: http://packages.geexbox.org
• Distribution: fremantle
• Component: main

There is a thread about enna at maemo.org,too. the current version is 0.40.

It looks amazing and it's still under development :-)

source: ben's blog & enna

UPDATE:

The guys from maemocentral took a video about Enna on N900: