This Sunday, June 28th, Pope Benedict celebrates the Mass for the Imposition of the Pallium (there's probably a real name for this if someone could help me here). We have all watched the development of the Papal liturgies over the past several years. This is yet another step forward.
I'm not a big fan of worship aids, but you might find this one interesting.
Note particularly how the assembly participates, "despite" the use of chant throughout the Mass!