It looks like OnStar is not just for notifying the authorities of an accident or getting your car unlocked anymore. OnStar's ninth generation hardware will reportedly support audio Facebook statuses and SMS messages. It seems there's no way to get away from social networking anymore.
The OnStar social networking service works over audio. Facebook and SMS messages are read to drivers and drivers respond verbally with voice transcription typing the responses. This is being launched as a part of OnStar's "responsible connectivity" initiative that is hoping to keep driver attention on the road instead of mobile devices.