If you were around on Earth Day for the PriusChat Earth Day Live Chat with Doug Coleman from the Prius product team, you already know half the story.  The Prius will have a factory-installed iPod integration option for Navigation-equipped models beginning with August production and most likely hitting the shores in September.  What Doug couldn't (or wouldn't) tell us back in April was the price of this upcoming option.  Today we have news from Toyota's Flickr and Twitter feeds that the