A2DP only will allow streaming music from the phone to the D3 via bluetooth. It has nothing to do with contacts.
For phone book transfer you want:
Phone Book Access Profile (PBAP, PBA[1])
This profile allows exchange of Phone Book Objects between devices. It is likely to be used between a car kit and a mobile phone to allow the car kit to display the name of the incoming caller.
Actually, Stigy, not quite correct. The Bluetooth Phone Book Access Profile (PBAP) allows a head unit to go into a cell phone and PULL the entire phone book from it. Unfortunately, the D3 (with a BTB200 Bluetooth unit) does NOT support PBAP at all...period.
So, to get phone book contacts INTO a D3 with Bluetooth, one needs a cell phone that supports the Bluetooth Object Push Profile (OPP) and OBEX protocols. It's THESE two Bluetooth profiles/protocols that allow a cell phone to PUSH phone book contacts TO the D3 with Bluetooth.
By the way, neither the iPhone nor the new Palm Pre currently support OPP or OBEX. Therefore, neither of these cutting-edge phones can get phone book contacts into the D3. If only Pioneer had made the BTB200 unit able to PULL contacts -- or be update-able with new Bluetooth software!