I agree that this is Pedrosa's chance to finally win a championship... but he has another Spaniard who will have a say and an Italian who may end up throwing a few wrenches in the works.
Lorenzo shouldn't be out too long since the collarbone is the best bone to break if one has to go. He shouldn't miss a race but will be severely hampered for a couple and who knows after that.
It obviously all depends on the severity of the break and his ability to heal it.
Fingers cross that this doesn't blow the championship wide open. If Rossi is going to be a factor now is the time for him to show it. Crutchlow will also be pushing it hard since he wants a factory ride next year. This could throw extra gas to the fire if his added "ambition out weighs his skill" (reference from Stoner to Rossi) and takes out himself and a leader.
Should be interesting!