Showstopper update, please read

Hello, I've updated my showstopper list with a few more items, and, more importantly, I've added defacto owners to most of thoese items. The people chosen as owners are the ones who seem to be actually working on these items. Or in a few cases, the ones who seem to be most suited for the task. I would like to remove the ``de facto'' tags from each of these items. I will do so as soon as the corresponding person speaks up and designates himself as the owner of the task. If anyone wants to disclaim ownership, please speak up as well. Similarily for anyone who is not mentioned, but who wants to become an owner. Ben (typed by Martin)