For those of you who had been hoping to get your hands on a new 2008 Zero X electric motorcycle, we have some bad news. They are all sold out. Now, the good news is that a new revised-for-'09 model will be making its first appearance at the Alt Car Expo in Santa Monica, California, on September 26-27. Of course, we'll be there, on the lookout for all the coolest greenery at the show. We'll need to wait until then to find out what changes have been made, but the press release after the break makes it sound like a thorough upgrade with changes to the frame, suspension, brakes and electric drivetrain. Specs indicate 23-horsepower and just 145-pounds to move around, plus rider. That should get things going pretty briskly. Want one? Don't worry, the new bike is scheduled to begin shipping next month, so the wait shouldn't be too terribly long.