Marcus Wohlsen on GORP.com posted a (slightly vague) list of the top hikes in the world:
Certainly we disagree with including the Inca Trail. (There are many better hikes in Peru.)
And you are still required to join GORP (free) if you want to click on the links. Jump to the web page on GORP: Hiking and Backpacking Trips – Top Ten Treks
besthike.com 