Many people on the FOSS
community have been complaining about Sun patents lurking under the OpenDocument standard, disabling it from being an "Open" standard at all.
This Sun patent exists due to the fact that most of the OpenDocument standard is inherited from the OpenOffice.org 1.0 file format, which belongs to Sun.
To cease this unease Sun recently made a new a statement
saying that, in other words, nobody have to worry because he really want it to be free for all and will never use its patents against nobody for the use/implementation of OpenDocument.
Simon Phipps, from Sun, already made a really good digest
about it. So, I will not try make another one here. :-)