Any interesting keyboards?

[Morq]

Heya guys, I've recently got my hands on a shiny nexus 7 and been wondering about something since then ->
Are there any keyboard docks similar to ones of Asus Transformers? Eg. a keyboard dock that would also have its own battery to charge up nexus when its plugged in?
I've been looking but can't find anything, please help

 

[MarkD60]

Amazon has some that the Nexus 7 snaps into and it makes a hard case.

Amazon.com: SHARKK Google Nexus 7 Bluetooth Keyboard Stand Case: Electronics

There's several that look identical.