I am planning on getting an Ipod Touch (2g) in the coming Month and I was looking at the Apple USB Power Adapter. Does this give the device power for only charging? Or can you use an Ipod Touch while this is plugged in? I have never owned an Ipod before so I wasn't sure...I own a Sansa device and whenever that device is plugged into my laptop to get a charge I am unable to use it....I was just curious if the Ipods are the same way when they are charging. Thanks!