A lav mic box is usually hooked on the belt, either front or back. I can see that having the suit jacket hanging over it would have looked awkward, but wouldn't the box be clipped onto a more neutral place? Audiences are familiar with that kind of device.

In one of the AP sites they said there is a receiver that plugs so deep into the ear canal that no one would see it unless they were looking directly into the ear.

Evidently for some time now there have been questions about Bush's use of a transmitter, notably during the meeting between himself and Chirac, when the words that Bush said were audible before he said them.

Where was Kerry's mic?