I think now that the iPhone bluetooth version has been updated, the next version of Sync should improve iPhone & Microsoft Sync communication.
The whole reason the iPhone was lacking support, was due to the extremely outdated Bluetooth version in which the iPhone had.
Maybe now, that the iPhone bluetooth version is updated, the next version of SYNC will include text message support, as well as improved voice quality (which is still lacking when paried with the iPhone - my Blackberry sounds twice as good when paired, versus my iPhone).