Surely nothing mate, the phone stays in your pocket, all control of the phone is through the stereo so it will all be legal as soon as the headunit is in :)
Have you decided which one to go for?
I've got the Pioneer double-DIN on order, same as Johnboy. Can't wait, *really* fed up with the lack of tunes in the car !
Yeah I've figured out a fair bit about the Bluetooth since originally posting. I thought I'd needed a cradle but I think I don't need one if I use the controls from the head unit, e.g. loading my phone book into the head unit and making calls from there without having to touch the phone. I also wasn't originally sure that the head unit came with a microphone but now I can see that it does.
The phone feature is very good, once you have loaded in your contacts, you can dial out from the head unit, also you can dial out a number thats not in the contact list too, just by entering the numbers, so your phone can stay in your pocket all the time. The supplied mic is very good too.
Sorry to hear your having trouble tracking down a unit Steve.