TJ13 have a very interesting article on the subject: http://thejudge13.com/2014/08/24/f1-...puncture-gate/

I'd single out this bit: "TJ13 is aware the Stewards looked into the incident during today’s race, quickly concluding no further action was required. For their part, they felt that Hamilton had not fully complied with the rules, leaving it nigh on impossible to hand a punishment to Rosberg for causing a collision."

Their point is basically that, according to the rules, Hamilton should have given Rosberg room. He didn't and Rosberg didn't yield either, therefore causing the collision. Now, I agree with pretty much everyone in here: Rosberg was the main responsible for the accident. Lewis should have given him more space, he didn't, and the result is that they crashed. It's the same brand of aggressive racing we have seen in the previous races and the "win" went to Rosberg the same way that it could have been the German earning a DNF and Hamilton winning the race.