No longer included with the iPhone 3G as it was with the iPhone, and no longer packed with the same extras that were found in last year's accessory package, Apple's official dock for the iPhone 3G is called the iPhone 3G Dock ($29): a plain white plastic piece with a rubber bottom that can stand the iPhone 3G up on a desk, outputting audio from its bottom. It also provides pass-through Dock Connector functionality, for connection to the iPhone 3G's…