The net-net is that only radio muting and sound through the factory speakers is possible. SIO Communications out of Edinburgh/Livingston are working on a setup for the RNS-E DVD nav unit. Bluetooth is supposed to be rolled out into worldwide production this summer some time, it may be best to wait until then. If there is a module that plugs into the head units, you can be sure they will go like hot cakes.

I put the basic Nokia kit in mine and it works great. The only thing is, if you put the microphone in an "upper corner", make sure you turn the left air vent off, or point it away otherwise the other person wont be able to hear what you are saying.....