Sedevacantism?? With so much work to do, you want to argue semantics?

I haven't a clue.

Really, I just found this word on another website and my initial reaction was: Say, What?

What some are trying to say has something to do with their not accepting Pope John Paul II as the Pope and successor to St. Peter. And that means to them that Pope Benedict XVI is not "their Pope" either. My response: Give it a rest, people. You're doing nothing to help build Christianity by your infighting over something that is so easily refuted. Click the link/title and you'll get an education.

Okay, directly from the source, here are two quotes for your meditations:

"The Roman Pontiff, as the successor of Peter, is the perpetual and visible source and foundation of the unity both of the bishops and of the whole company of the faithful."
Vatican II: Dogmatic Constitution "Lumen Gentium" §23 (November 21, 1964)

"That the Primacy is to be perpetuated in the successors of Peter is, indeed, not expressly stated in the words of the promise and conferring of the Primacy by Our Lord, but if flows as an inference from the nature and purpose of the primacy itself. As the function of the Primacy is to preserve the unity and solidarity of the Church; and as the Church, according to the will of her Divine Founder, is to continue substantially unchanged until the end of time for the perpetuation of the work of salvation, the Primacy also must be perpetuated. But Peter, like every other human being, was subject to death (John 21, 19), consequently his office must be transmitted to others. The structure of the Church cannot continue without the foundation which supports it (Mt. 16, 18): Christ's flock cannot exist without shepherds (John 21, 15-17)."
Dr. Ludwig Ott: "Fundamentals of Catholic Dogma" pg. 282 (c. 1960)

If the above is accepted as truth, then there's no room for "sedevacantism" now, is there? I can't believe that Catholics actually spend valuable time working on ways to undermine the Church when there are thousands of people who have not yet heard the Gospel.

What a waste of time and talent, huh? Now, go volunteer somewhere and live your Faith!