Just finished fitting a Parrot CK3000 bluetooth handsfree to the baby. Briliant bit of kit. Put the mic in the interior light fitting behind the little grill at the front, it used the radio speaker so I wired it into the redundant Reno tweeters and the switch fits next to the light dip dial. Small hole drilled in the square panel for the wire (had to cut and reattach the plug.
Basically its invisible cept for the switch (green ohone/red phone).
Just thought Id recommend it, was 90 quid off the net.