Rich text would be the best way to go. From my experience, the supposed "Office 97/2000/XP" format is sketchy at best. Yeah they'll get the idea of what the document's about, but there's no way in hell they'll be able to edit it. I made the mistake of typing a HUGE report once and saving it as a .doc from OOo. Spent some time fixing that booboo...the computers at school running Office XP could read it, but any sort of change whatsoever and it sent the entire document off-kilter. RTF is definitely recommended. As of Office 2003, Office users will be able to read XML (if not write it), which will DEFINITELY be cool .