This is worth looking at, if only just for kicks: http://sports.espn.go.com/ncaa/recruiting/football/columns/story?columnist=luginbill_tom&id=3233826
Future NFLers include: Sean Spence, Dwayne Allen, DaQuan Bowers, Julio Jones, Janoris Jenkins, and A.J. Green- and that's just from the top five teams. Miami, with the top recruiting class in 2008, has Arthur Brown projecting as a likely second day pick in 2013.
In 4 years, 30-40 of the top 100 guys will be top NFL prospects. That's pretty good.