This adapter has connectors for both the phone wall connector and the USB. In the UK recently I charged up My Droid3 by plugging it into one of the USB ports; it showed that it was charging so I went down to dinner. 90 minutes later the phone was indeed charged - and it had made more than 120 calls back to the US to entries in my Recently Called list and to itself! Cost, according to VZW, $298. Brookstone have agreed to refund the cost of the adapter, I'm still in discussions with VZW.
On an earlier comment in this thread that you can't use the phone while it's connected to a laptop via the USB, I do it everyday and it works perfectly.