I confirmed with a coach at H.D. Woodson in Washington (D.C.) that defensive back Ke'Von Hunter will be in Pittsburgh for an official visit this week. Hunter's coach tells me that he's a 6'3" 180-pound cornerback who will probably grow into a safety in college. He also says he runs sub-4.5 40-yard dashes; even if you adjust that for a coach hyping his player, a 6'3" safety running 4.5 or 4.6 is pretty impressive.
Hunter will probably take a visit to Florida in August and then three more official visits during the fall, so he's not likely to be committing any time soon.