thanks guys for all your suggestions! I'm now a week and a half post air cast and I'm doing great. I still have some stiffness and swelling, but that's normal. My orthopod gave me a smallish, ankle support sleeve, but it was so uncomfortable, my PT thought it OK to do without.

I bought the BMX pedals, but haven't tried them yet (out of town all week). I audibly gasped when I saw them, they are sooo huge! I have small feet, and couldn't imagine how they would work. But the fitter concurred with your suggestions, so voila! Once in PT, I biked a few minutes on a stationary recumbent (flat pedals) and another time on a spinning bike (toe clips) at my gym. No problems whatsoever, but I've only done a few minutes each time. I hope to get the trainer set up this afternoon, and start getting some real time back on the bike. Perhaps in another month, I'll be ready to do some short, flat rides outside and build from there. I think more than anything, I need to build my confidence. I'm really OK with baby steps. I wanna be ready when Meidei comes to Atlanta.