Well, today I was able to do 3 pushups with my hands elevated on a weight bench. (For my first set. In my second set I did 2. Third set, 1. Then I did 2 sets of 10 negatives.)
Also did some shoulder mobility work (the W-Y Wall slide depicted here: http://www.flexibilityrx.com/shoulder-mobility-exercise-scapular-wall-slides/
) and discovered quite a significant improvement: I can actually touch the back of my left hand to the wall for the bottom part of the movement. I am tantalizingly close to normal shoulder function, y'all. This is cool.