I definitely still drift a lot (and overshoot turns), but there were no collisions or even honking -- even though I was initially responding really badly to bicyclists on my right (slowing down AND moving over into the lefthand lane? terrible idea). And I successfully yielded to rotary traffic (and am developing more of a habit of looking in my lefthand mirror at least). And there was one intersection where Shoshana said she was impressed by my handling of it (mostly her verbal contributions, other than GPS-type stuff, were to express concern about my driving -- which is totally fair and appropriate).
I'm not sure if I'm now less or more nervous about highway driving this Saturday (with FCS-Ian, going to Framingham for Super Saturday).
Oh, and I didn't think to intentionally look after I got out of the car when we were done, but I pulled up in front of the church and I don't think I was ridiculously far out from the curb.