O site SoftPedia acaba de postar o calendário da próxima versão do Ubuntu: a 12.04 LTS PP. Segue ai:
December 1st, 2011 – Alpha 1 release
February 2nd, 2012 – Alpha 2 release
March 1st, 2012 – Beta 1 release
March 22nd, 2012 – Beta 2 release
April 19th, 2012 – Release Candidate release
April 26th, 2012 – Final release of Ubuntu 12.04