I missed the show on History Channel on the Knights Templar called "Holy Grail in America", but it will be reran on Saturday, Sept 26, 2009. The show is about the Kensington Runestone and other clues that back up the theory the Knights did arrive on the Americas in the mid 14th Century, a full one hundred years before Columbus.
The speculation is they brought a huge part of their treasure and hid it somewhere in the continent. Oak Island is brought up, but they would not put any parchments where they would get wet. Could it be a decoy?
I will watch the show and give a review.