I previously read the link you provided, and I understand that Lighty and Turner may not be back in 2010/2011 season (freshman year for Craft, 'Spoon, and Payne). However, all of this discussion is omitting a very key point: The early signing period is in November, which is when the vast majority of good players sign. This coming November, no one will know if Lighty and Turner will be back, as their season would not have even started yet. It's possible that the subject players would wait until after the season to decide on a college, but that is a major risk for them, and I doubt that happens. Their other options may have moved on by them and filled up their classes.
I say again that there is one spot open and several people have been offered scholarships. I see this as a first come, first serve issue. I am baffled by the discussion of getting mutliple additional players in this class.