I’m not sure about this .. maybe Donofrio’s Blog would give more indication to this.
In any case, once the Electoral College votes Obama in, it’s a done deal.
Impeachment is highly unlikely.
Yes, the EC did vote today. But their votes are secret even though it is expected they voted for Obama. Obama is not officially President-elect until the votes are counted by Congress and VP Cheney and the total certified. That will happen on January 8th. Then Obama would be President-elect until being sworn in at noon on January 20th.
We have a Chicago crime investigtion going on and there are more cases pending and headed to the SCOTUS. A lot can happen between now and January 20th! :)