After reading the article "
Switching from" fake "software to free software ", I decided to upgrade my OpenOffice to version 3.0.
Everything, I think, I know that OpenOffice 3.0 will not be available on ubuntu 8.10, because the developers do not have enough time to check it out. Ubuntu 8.10 comes with OpenOffice.org 2.4.1 and if you want to use the new and improved version, then this guide is for you!
We will not do a new installation of OpenOffice, but instead, just update the current version in Ubuntu Intrepid.
Step 1 - Add OpenOffice.org 3.0 to the repository
Go to System -> Administration -> Software Sources ...
')

Go to the second tab, "Third-Party Software", click add and enter ...
deb http‍://ppa.launchpad.net/openoffice-pkgs/ubuntu intrepid main

Click the right mouse button
HEREand select “Save Link As ...”, save the key file to your desktop. Go to the tab, “Authentication”, click on the “Import Key File”, and specify the path to the key file. You will see that there is a new entry “247D1CFF 2009-01-21 Launchpad PPA for OpenOffice.org Scribblers”.

Now click the “Close” button and then “Reload” and wait for the application to close!

Step 2 - Update OpenOffice to version 3.0
After you have added an entry to the repository, an icon will appear in the system tray indicating available updates.

Click on it and upgrade your system. That's all! Below are some screenshots of the new OpenOffice.


UPD : For those who like to do everything with their own hands, an option from
nvbn :
sudo echo "deb http‍:/‍/ppa.launchpad.net/openoffice-pkgs/ubuntu intrepid main" >> /etc/apt/sources.list
wget http‍:/‍/news.softpedia.com/images/extra/LINUX/small/key
sudo apt-key add key
sudo aptitude update
sudo aptitude dist-upgrade