Wilma definitely seems to have picked up speed, though that could just be temporary. The 12Z GFS moves it steadily towards the Yucutan until 36 hours, then slows it down and turns it north toward the Yucutan channel, brushing by Cuba in the 60-84 hour time frame. It then has an even sharper turn to the east, bringing the center just south of the Keys and the peninsula in about 108 hours.

Right now, it appears that Wilma is undergoing some shear from the west. The outflow is restricted in that part of the storm and there appear to be light westerly winds at some level blowing into the western side of the system at the moment.