Game Situation: Obstruction

 
Bases loaded and 2 outs. R1 on first, R2 on second, and R3 on third. The batter doubles into right field. As R1 approaches 3rd base, R1 clearly crashes into the shortstop, who is standing in the baselineabout 20 feet from third base. The base umpire points and calls "that's obstruction" (nice call by the field umpire, if I say so myself!). Surprisingly, R1 keeps on his feet, does a 360 degree spin, touches third, and (even more surprisingly) heads home. The defensive relays the throw home and R1 is easily out by 25 feet. B1 ends up standing on 3rd base.
 
The 3rd base coach and R1 saw the obstruction and heard the base umpire's obstruction call and they are waiting for the penalties to beenforced. What is the penalty? What happens to R1, R2, R3, and B1?
 
Call
This is certainly obstruction (see NF 2-22) and in NF there is a minimum award of one base (NF 8-3-2). However, the runner is awarded (some call it "protected" to) only the base that would nullify the obstruction.
 
In the case below, in the umpire's judgement, the runner was protected to third, but not to home. The runner continued to home at his own risk. Since he was thrown out at home, he is out and the inning is over.