When is the new season of entourage going to start

From “http://en.wikipedia.org/wiki/Entourage_(TV_series)#Upcoming_Season”

Production begins on Season 5 in April 2008[2] with 12 episodes to be initially produced. However, Producer Ellin said that if HBO decides to order more at the last minute, then they are up for it.[3] Season 5 planned to satirize the writers’ strike but has been scrapped as Ellin feels that most people are over the whole debacle and would prefer to deal with different material. Due to the writer’s strike, Season 5 will premier in September 2008 instead of June.[3]