Tom, I have a grand plan this summer to attempt to count every freakin' switchback on the MT. The 99 get all the press, but there are a ton more between the Portal and TC. It won't be a Wayne Pyle high-tech approach - just a clicker - and it probably won't be exact, but at least it'll satisfy my curiosity.
Naturally, this will be a project for the descent to help pass the time . . .