Guys,
Just a heads up. I'm still working on PyCar and making it ready for summer release with many things added. It includes a roadnav clone and fully featured HW DVD support( through df_xine ) on CLE266.
I will be making a release of PyMedia with optimized codecs once I have it properly tuned.
Also I will have support for USB headunit adapters, small graphical USB LCDs( 128x64 ) and of course USB touchscreens.
The goal is to make minimal release with as stable core as possible + some basic US navigation with simple routing( roadnav clone ).
During the next week I'll post more detailed roadmap.
Of course it is still open source and I gladly accept any help or feedbacks.

[EDIT]
Here is the roadmap for PyCar. Subject to change. Let me know if you have any questions.

1. Limited features Linux distro, 9Mb image
- mp3/ac3/aac/ogg/wma
- dvd/divx/xvid/wmv
- cddb support
- 20 secs boot time on ME6000
- touchscreen support( lilli, xenarc, egalax TS )
- splashscreens
- cd ripping
- full setup from PyCar including HDD installation from live CD

Mar-20

2. Limited features Linux distro
- FM radio support ( D-Link )
- XM radio support ( XMPCR )
- XM/FM ripping

Apr-30

3. First cut with linux based GPS embedded
- roadnav optimized version. Touchscreen friendly.
- simple routing
- 3D GPS nav views

June-30
[/EDIT]