I've made a couple of working and wearable shoe phones now. This was the first, and it uses a blue tooth headset as its basis.
So, I guess it is really a shoe headset rather than a shoe phone, but I reckon that's just a technicality. My extensive testing at work confirmed that people can't tell that it is a phone in your pocket ringing instead of the shoe ringing.
But if you want to see a shoe phone that is undeniably a shoe phone, then you can have a look at my second shoe phone.
But, enough philosophy, lets get started!
Step 1: Collect The Bits You Need
The H500 head set had two advantages over the Ericsson one: (1) it looked like the speaker and microphone were on wires and could be moved; and (2) there were instructions on the internet to help me disassemble it without breaking it.
Okay, so now I had a nice little head set, and all I needed was a shoe to put it in. Fortunately our church op shop was open, so for the bargain price of AU$3 I got a nice pair of very swanky shoes.