LibreOffice 4.0 is now generally available and in my mind, it truly marks the end of OpenOffice.org legacy.
Though LibreOffice started out as a fork of OpenOffice is has evolved to become so much more. The new LibreOffice 4 feels faster, because it is. It has more features than before too. Though to be honest my biggest pet peeve with OOo was also the speed of startup, which is no longer a problem with LibreOffice.