Your Portable iPhone Charging Dock Now Available for US iPhones.

We have seen the European version, now the US Version of the Clip-it for iPhone converts your iPhone charger to a wall dock; making
sure that you can easily charge your phone at every wall socket.
Unfurnished rooms, hotels and conference rooms are no longer a problem.

Shapeways 3D Printed iPhone Charging Dock

Clip-it
makes use of your existing Apple Dock Connector to USB Cable. Simply
snap it in and lock it by clipping it to your charger. Clip-it is
perfectly engineered to hold the latest two generations of original 30
pin Apple charging cables.

Clip-it US is designed for the iPhone 4 & iPhone 4S and the included Apple USB Power Adapter (US version). 

http://www.shapeways.com/model/680813/clip-it-us-edition.html