I have to say that this thread had the potential to be one of those long winded ones about monorails at any cost etc, etc. but instead it went off in a very intelligent discussion of the pro's and con's. I am not sure what changed from previous such threads. Maybe people are acutely more aware of economics, energy saving issues, mass transit technologies.
There is no doubt that there are greener solutions to the problem of transporting people at Disney but you have to temper your desire for that kind of efficiency with actual logistical and economic efficiency. Maybe one day in this country, it will become more economical to build rail based systems instead of expanding highways to accommodate more automobiles and buses. But until that time arrives, we need to continue improving rail technologies to combat some of the aforementioned problems and issues of spikes in demand, maintenance issues, and so forth.