Jim, in fact I don't like Microsoft Office nor Open Office, it's because i'm here
and looking for alternative office suite. My concern is about file format. Since SM uses his own file format, conversion to other is always question of filter quality, which may be good or bad but almost never ideal. And ODF is not mean Open Office, this format supported by number of office application - http://en.wikipedia.org/wiki/List_of_office_suites
Martin, then my question is - if I save newly created document as odt, what information may be lost or broken? And I hope you have plans to implement 2-way odf support to PlanMaker and Presentation.