With the new update, there should be a better way to edit files now, as can be red here, but it only states that it supports MS Office Docs, Photoshot and Keynote, any file with a Compatible Application installed.
So my question here is of course, which are all these possible compatible applications?
Also, with these applications, is there a specific version required or can i also use MS Word 2003 for example? (I know it's a harsh example, but it should still work with this wording: MS Office, no version specified)
Thanks for your Help 
Bernd