From the Hill:

Speaker Pelosi is backing away from a deal she cut with centrists to advance health reform, said a source familiar with talks.
Pelosi’s decision to move away from the agreement that was made with a group of Blue Dogs to get the bill out of committee would steer the healthcare legislation back to the left as she prepares for a floor vote.
Pelosi is planning to include a government-run public option in the House version of the healthcare bill. She wants to model it on Medicare, with providers getting reimbursed on a scale pegged to Medicare rates.
“The speaker is full-steam-ahead,” said a senior Democratic aide.