I really need Windows Phone to start supporting Bluetooth DUN profile... :-/ 

See: http://hybrid-piloten.de/1914/toyota-touch-richtig-nutzen/ (German)

And the MAP profile might also be nice, but that's strictly optional as Windows Phone can already perfectly speak SMS messages through bluetooth headset profile itself.

If you agree, please vote here: http://windowsphone.uservoice.com/forums/101801-feature-suggestions/suggestions/3349738-please-add-at-least-bluetooth-dun-protocol-in-wp