Just catching up after being gone a few days - and found this post in Jerry Galipeau's blog thought-provoking. http://gottasinggottapray.blogspot.com/2009/05/new-translation-of-texts-for-mass.html. He is looking at it from the perspective of a musician and composer, and as a result, the suggestions include things like having people immediately sing rather than say the new texts... not sure yet about that.
I am convinced, after watching how many parishes (my own included) did not make the last round of changes in posture, that nothing will happen or it will happen poorly until the priests step up to the challenge and lead. One of the most important groups to reach with catechesis about the whys and wherefores will be the pastors. If they can explain it, model it, and expect it, the people will catch on. If, on the other hand, they feel the changes are silly or cannot explain them well, people may well pick the path of least resistance and continue with the practices they have been familiar with for years.
So, who will instruct the clergy? Clearly it is the responsibility of the local bishop. It will be interesting to see how well this plays out across the country.