I had assumed that because Red Bull didn't institute team orders in Sao Paulo that the driver's championship is over in favor of Alonso. But ESPN has a good article today that suggests this is not the case, once you factor in all the tiebreaker scenarios.
If Vettel wins Abu Dhabi and Alonso finishes fifth, Vettel wins the championship (doesn't matter where Webber finishes).
If Webber wins the race and Alonso finishes third (very possible since Vettel would probably be second), Webber wins the championship. (Unless Vettel lets Alonso through to screw his teammate... Can you imagine???)
It seems Vettel needs McLaren to be fast in Abu Dhabi and finish 3-4. Webber only has to beat his teammate. What a