The iPhone 3G has arrived. So what? We let three of the Web's top Apple bloggers break down the big picture: Matt Buchanan, the Gizmodo associate editor who's scouted iPhone wannabes for PM... Pete Mortensen, the Jump Associates consultant and Cult of Mac geek who was our live blogger for the 3G iPhone unveiling... and Arnold Kim, the MacRumors senior editor who breaks news faster than Steve Jobs keynote. Plus, Joel Johnson takes us behind his investigation into Apple's secretive Made for iPod and authentication chip programs. Less