the new infotainment system used in the latest bmw's (navi professional and idrive) is a cooperation of harman/becker, called Harman Infotainment.
i am also looking for a possibility to "open up" the system in order to play videos/movies (avi, wmv, mpg etc.) directly from an attached usb storage (flash or drive) - even avoiding a separate carputer because the idrive is so highly integrated. the hardware seems powerful enough because it can play digital tv broadcasts (don't know about high-definition though).
any open source project trying to do this?