The iPad Dock for the iPad 2 and new iPad 3 from Apple is a desktop dock, compatible with the iPad 2 and 3. The dock makes it easy to sync and charge your iPad. It connects to a computer using the USB dock cable that is included with the iPad, or to a wall outlet via the AC adapter that ships with the iPad.
Any adapters or cables that can be used directly with the iPad 2 and 3 via its dock connector can also be used via the dock. If you use the Digital AV Adapter, VGA Adapter, or the Component/Composite AV Cable to connect the iPad to your TV, you can connect that cable to the dock and the iPad's video output signal will pass through to your TV.