I gladly inform that in my university (U.N.S - Bahia Blanca - Argentina) the profesor use VL for learning. I sugest it and they use becouse i can work of any computers. It`s use in "Organizacion de Computadoras" for C programing and Assembly languaje. They use a Live Cd version with the learning programas. Congratulations
Continue with the good work
PD: For mor detalis send me a PM. Meybe i can put in contact with the profesor.