The items will not be transferable. It appears that the people at Blizzard have given up hope of ever making their game hack-proof and have instead created the ladder zone as a self purging zone. The intent is that even if bugged items and crazy dupes showed up, they would only come to pass back into the wasteland of non-ladder at the end of the season.
does that mean that all ladder items will come on non-ladder?
or will all ladder items disapear?