Well, that's a way to put things...
In fact, OpenOffice.org has been forked into LibreOffice held by Document Foundation and is now available for download and usage.
If you already have OpenOffice in your Ubuntu and you want to try LibreOffice, just get the tgz from here, unzip it and then install it with
sudo dpkg -i $WHERE_YOU_UNZIPED/en-US/DEBS/*.deb
sudo dpkg -i $WHERE_YOU_UNZIPED//en-US/DEBS/desktop-integration/libreoffice3.3-debian-menus_3.3-9526_all.deb
