Good news! -- Yesterday I did the first "real time" driving since December 10th!!!
Had to drive to my hairstylist's to get a desperately needed haircut before my Tuesday job interview (another piece of good news). Tom offered to drive, of course, but I insisted on going by myself because it's only 10 and a half miles there, a basically straight shot on a not too heavily travelled road. I wanted to get a feel for what my left arm would do on a fairly simplee drive before having to start driving the more complicated distance over pot-holed roads to physical therapy after Tom goes back to work next week. (Having him called for a project is also good news.)
I've still got quite a way to go to get the mobility in my arm back, but this is a major milestone on the way to getting back to something that resembles normal life.