California Governor Arnold Schwarzenegger is holding a press conference tomorrow with Tesla Motors, makers of some of the coolest electric cars on the planet, to announce a 4 door, 5 passenger sedan slated for release in 2010.

Not much information right now but rumor has it that it will be called the Whitestar and should be as efficient as the Roadster model now making the rounds.

The Roadster costs $109,000 but the sedan should be slightly less given its “green family” appeal. We’ll be there tomorrow for some on the scene reporting. Here’s hoping Gov. Schwarzenegger screams “Come with me if you want to live” to the assembled press and then says “Do it, do it now” to the plan to increase the number of electric cars on California roads.

Update: The new sedan will not be called Whitestar. Also, this is some sort of partnership with the state of California, it isn’t just an endorsement or random appearance by Schwarzenegger.

Update 2: The announcement is that Tesla will manufacture the sedan in California, instead of going to New Mexico, thanks to a $9 million incentive package.