Any progress on this?
I find it really annoying that it doesn't exist already in it.

I got a BH-804 and when i connected it to my N900. I took it for granted that it wouldn't come sound from the N900.
But no its either silent (no sound from N900 or BH-804) or public (sound from both).

Anyways would be really awesome if someone have any solution to this i think it would do many a favor!