Turns out there are these things called "cam walkers" which are commonly used with broken ankles.
If this is what my ortho doc meant, then this is good and possibly bad. It would be good in that I could then walk instead of rolling or hobbling around. It could be bad in that it will mean more time until I can drive again.
I will call today and find out if this is what the doc meant, as well as which kind(inflatable, pre-inflated, range of motion), if he did.