I fought this battle with Pioneer, and was told, in essence, "You lose, sucker." The next iteration of the BT interface will be internal (as opposed to an external interface like the CD-BTB200) and Pioneer has no interest in fixing the compatibility problem between Palm OS-based smartphones and the CD-BTB200.
My solution was to buy a Palm 700wx off of eBay (about $175), switch my service to it, and install the Jetware Mobile SW. This is an imperfect solution, as you still get limited functionality. Pairing the devices is still a challenge, but it can be done. When I fire up the car, I have to take out the phone, switch off Bluetooth, then switch it back on again. It then communicates with the CD-BTB200 and all is well. However, everytime I get back into the car, I have to do this all over again.
I also can't dial through the N3 display, can't store speed dial numbers, and there's no caller ID. But I can answer calls through the N3, and dial calls from the phone while I talk on the interface.
I think this is going to be my last Pioneer purchase, though. Their lack of candor about the compatibility issues, and uncaring attitude about trying to provide a remedy has soured me with the company.