My wife has an 06, and I can say safely that the bluetooth will work only out of ONE speaker (the driver side). So as long as you don't mind your music in mono (yeah, right)...
I am assuming you are talking about an 06 with NAV as the standard audio does not do bluetooth. Also the bluetooth in the 06 is funky, it may or may not bind with another bluetooth device. I know it works (kind of) with a Moto Razar. I would at the minimum try binding your device to an 06 before you buy it.
Good luck.
nc