Looks good. Is there anyway you could measure the gap between the phone back and the cradle when docked? I am trying to figure out if this could work with an extended life battery. So far the only one I know that will is the Seido one, but this one looks better. Thanks for posting this.
Also, like I said in the video, there's also a bit of flex or give in multiple directions because the only thing holding the phone in its position is the microUSB connection. So, you might be able to fit in an extended battery, depending of course how much it adds to the back of the phone.