@edgarblythe,
The 5:00 update just came out with a shift to the west in the overall track. The trough that is supposed to push Earl north and east is stalled over the midwest (tilting slightly, perhaps) but not moving east as quickly as originally thought. Also, Earl is speeding up a little bit. If he continues to accelerate and the trough continues to stall then the big push is going to happen later. He's also restrengthened to a Cat 4.
We already see Earl's cone of uncertainty covering the Outer Banks of NC, but now SE New England, including the Boston area, is back in the circle.
The next 12 -24 hours are key to see where he's going to turn. If he stays slow and gives the trough enough time to get unstuck then he'll curve as planned. If not, then a NC or Mass landfall is possible.