Available for download.

As the OpenOffice site expresses;
Beginning with version 2.0 OpenOffice.org uses the open standard OASIS OpenDocument XML format as the default file format. The OASIS OpenDocument format is a vendor and implementation independent file format, and thus guarantees freedom and independence.Read More>>
Actually I saw this news through one of the blogs at blogspot http://cnpchillers.blogspot.com/.
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