nsacpi
Expects Yuge Games
Interesting approach in which they weight prospects with different weights assigned based upon their positions, the strength of the league they played in, and how close they are to contributing at the majors.
http://www.baseballamerica.com/majors/a-simple-accounting-of-farm-system-impact-potential/
http://www.baseballamerica.com/majors/a-simple-accounting-of-farm-system-impact-potential/