LibreOffice 4.0 Available for Ubuntu 12.10 and 12.04, Using Firefox Personas

LibreOffice 4.0 Final is now available via the LibreOffice PPA. To install it in Ubuntu 12.04 or 12.10, follow the instructions below:

sudo add-apt-repository ppa:libreoffice/ppa
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.
Features of 4.0 Final

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

How to Install Personas

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.