The Cardo ScalaRider headset is not a stereo headset.For the TomTom you can use this one for exampleCardo scala-rider®-Bluetooth®-Headset
Does the TomTom send stereo over bluetooth (also known as A2DP)? Stereo Bluetooth headsets that recieve a mono signal will send it out both channels; so you have to test with a MP3 that has stereo to really find out.
Guess I will have to wait until either of these companies upgrade.
I would really like to see them add FRS, intercom, and a AM/FM/HD reciever to the units; so I can just have one hunk of hardware for all my needs ;-)