Apple’s website has revealed two new iPhone accessories that will likely debut alongside the iPhone 3G. First is the iPhone 3G Dock, which offers USB charging, syncing, and audio out, as well as the ability to use the iPhone in speakerphone mode while docked. Also new is the Apple USB Power Adapter (2008), which slims the original iPhone and iPod charger down to a small white adapter not much larger than a standard two-prong to three-prong adapter.…