Using OpenOffice.org with Hardy, after having manually introduced the symbolic link:
lrwxrwxrwx 1 root root 19 2008-05-03 10:27 java-6-sun-1.6.0.03 -> java-6-sun-1.6.0.06/
in /usr/lib/jvm so that writing Flat ODT and DoccBook/XML actually works, I have found that the Flat ODT file is written as a single line. Clearly this is fine as far as XML processing is concerned but it means that this format is useless as a text-based format for storing in a version control system -- mergeability requires that the file be line structured so that merging does not simply result in replacing the whole file (because the whole line is replaced.
If the fodt file were line structured as the DocBooc/XML file is then it would be far better for storing in a version control system.