This news per the NYT and CNN.
Plus, MSNBC broke into Tweety's show with it. More as it develops.
Our long nightmare may be over...snark button on full strength. ;)
Update: The WSJ is reporting the dealbreaker was:
But close advisers to Sen. Obama signaled an Obama-Clinton ticket was highly unlikely. People in both camps cited what several called "a deal-breaker" -- Bill Clinton may balk at releasing records of his business dealings and big donors to his presidential library.