What he said. No mere charger/outboard-speaker solution, the Desk Phone Dock wraps a traditional desk-phone interface around an iPhone charger, along with speakers and a built-in microphone (for speakerphone functionality). The connector box lets you charge via AC or the USB connection. The volume knob doubles as an instant mute. They've even come up with a cute "PC vs. Mac"-style animated advert to extoll its virtues:
Created by KEE Utility of Seoul, the Desk Phone Dock is scheduled to be showcased at the China Sourcing Fair in Hong Kong later this month. No word on price/availability at this time.