FindAWay - I think you'll find that most JUCOs move players on and most will put the names of their players on their website and where they've signed. It's important to look beyond that though... are they contributing where they've moved on to. Probably the number of kids they move on is important as well. From what I've observed, players rarely loose interest from the four year schools when they go to JUCO unless they're injured and just can't play at the same level.
The assistant at Louisburg was headcoach at Hiwassee in TN I mentioned. Super fella!
If I may make a suggestion, I'd narrow down the things that are important in a fit for your son... location, possible scholarship amounts needed, academics/degree, etc. and then search JUCOs that meet his individual needs. Many areas are heavy with JUCOs and others not.