Ok had the DX for a month now...

[manyrivers]

My dX has done voice dialing via BT from the first day I got it. Plantronix Pro headset and stock dX w 2.1.

 

[manyrivers]

I don't unlock my phone before BT dialing. It just works.

 

[MalikBear]

I don't unlock my phone before BT dialing. It just works.

Same here, Jawbone Icon!