He has five stitches on the back of his left hand. His lower right arm has a few breaks. (In the radius/ulna areas, but I've no better information than that, at present.) His left foot is dislocated. They took him into surgery around 5:20 for that last one.
His motorcycle boots did their job well in protecting his ankles, but the force of a body at 70mph... well his foot's not quite where it's supposed to be. There's hope that they'll be able to bring the swelling down enough to put the joint back into place, without having to cut. Other than that there's some various scrapes, but he is in pretty good condition and spirits. They'll keep him overnight at the hospital, and probably release him tomorrow.
Before rightkindofme or I got there, the guy that hit him, and stopped to assist directly after, came in to see him. Apparently the other driver has a son who rides, and was very shaken by the accident.
I'll be going back to the hospital in a bit. I'll call rightkindofme with news as soon as I have it, and suspect that she'll update here.