I just bought an 05 Acura TL. When I pair my phone all seems fine until I send/receive call. I can hear other party, but they cannot hear me. Acura dealer said it's a Blackberry problem. I tend to believe them as the loaner they gave me duplicated the exact same problem. Anyone have any previous experience with this issue? Thanks for your help with this as I am about to pull my hair out!!!

The loaner phone they gave you duplicated the same problem?
I'd say it's the bluetooth in the car then.
Get a buddy of yours to try it out on their bluetooth phone too, have them come to the dealer and show them that it's not working on any bluetooth device. Might as well be able to use something if you paid for it :P

Acura is telling me that the Handsfree function in the car makes use of the phone's microphone when it's bluetooth enabled

meaning you get sound out of your bb speakers instead of the car kit speaker?
Wouldn't that make it pointless?