Future owner of a mazda 3 gs, total newbie here.

Quick questions RE the stock radio/mp3 unit that comes with the M3:

- does it support the ogg vorbis format? (yup, linux/OSS geek here)
- can it play tracks (mp3 or hopefully ogg) out of a DVD-ROM, or only CD-ROMs (700MB) are supported?
- can you browse your mp3/ogg collection by genre?


Bonus question: does anyone know if the fancy pioneer or kenwood double-din touchscreen units supports vorbis?