I've been trying to find the same thing, I want to be able to view PowerPoint, Adobe Acrobat, and Word files - but I've come up blank. If anyone has any ideas - please fill us in!
as of right now i think the only way you can actually "see" these files is as an attachment to an email ... but from the look of the screenshots of OS 4.3 it looks like they will allow you to view your saved files as well ...