sudo apt-get update
sudo apt-get install libreoffice
LibreOffice 4.0 Beta 2 is currently available by default in Ubuntu 13.04 Daily Build.
It has an impressive list of new features:
- now integrates with various CMS (Content Management System)
- uses Firefox personas to theme it
- contributing to LibreOffice is easy using Gerrit
- converting non-native formats is now improved
- can edit Visio and Publisher documents
Open up LibreOffice and go to Tools->Options->Personalization. Click the Select Persona button, and in the Persona address field, enter the link to the desired Firefox Persona (e.g. this example uses http://www.getpersonas.com/en-US/persona/462094).