What does Free Software Really Cost?

There have been a lot of TCO studies, even one in the nonprofit sector that NOSI did several years ago. (It's in the primer, under case studies.)Here is yet another perspective about TCO - a very straightforward one. Linux has matured since the time that we did our TCO study, and the equation is becoming even more lopsided.What do you think? Is it time for another nonprofit TCO study?