I was reading the Floating Leaf build on ddowiki and stumbled across this particular comment:
"Note: The Floating Leaf uses rapiers as its main weapons. While using non monk weapons, this causes the Floating Leaf to be uncentered. However, this does not cause it to lose the monk AC bonuses."
This contradicts the official word from Turbine that a Monk loses all of its abilities when uncentered, including the AC bonus from Wisdom.
I would be inclined to go with the official line, but would like to know if anyone has any evidence to the contrary.