I'd really like to see BMW integrate the iMessage application into the interface. Especially since this is widely suspected to move to the next release of the OSX platform, so it will pretty much be supported as SMS/MMS across all Apple products.
I guess there's some reticence to support messaging while driving, but I would absolutely love the ability to see what's been sent, and then have some quick-reply suggestions ("I'm currently driving; I'll message you back when I reach my destination", etc). I would think that the benefit gained here by promoting a safe method of reply would win over the urge to respond on the hand-held device itself, causing a potential safety situation.
Delivered! '13 F30 328i, 8SA, Estoril Blue II w/ Black Lthr. ZMM, ZPP, ZTP, ZLP, ZDA, ZCW, ZDH