http://en.wikipedia.org/wiki/NBA_high_school_draftees
Most of these names are ones I don't recognize (maybe that has to do with me not paying much attention to the NBA).
And I assume you are correct in that the NBA was trying to protect its own product, rather than hoping to make the college game better (having the kids stay only one year doesn't really help the college game that much...I think another year or two would do that, but the NBA doesn't care, methinks...this is the point I think Dean was trying to make).
7 of 8 from 2004 are still playing.
8 of 9 from 2005 are still playing.