It might look like a regular iPad dock, but according to Mustek the DockingScan S400 is actually the first integrated "Made for iPad" scanner.
Working together with the i-Scan App (available from the app store), the S400 scans pages up to A4 in size. Scanning is a simple affair-- one simply puts the iPad in the dock before starting the scanning app.
Scanned images are then automatically saved in the iPad photo app, with resolutions of up to 300 dpi in jpeg format.
Compatible with both iPad 1 and 2, the device also serves as a docking cradle and a charging station.