luf started working on getting some of this supported directly bluez so the car would be able to read them without espeak. The code is in place to advertise that the phone now supports MAP but it doesn't have the necessary code to send/reply the information to the car, ie inbox appears empty on the Blue&Me system in my Abarth (also used on Fiat/Alfa).

There is a Qt implementation in the Harmattan version IIRC which he may/may not have tried to port. As a I recall, testing it with a script from laptop allowed me to retrieve a list of available folders (ie inbox) but not receive the content. That needs implementing as does monitor/notification of new messages.

Might take another look at it at some stage.