This tutorial takes a cheap and discontinued Motorola Atrix laptop dock and connects it to your Raspberry PI.
Checkout the original link here -
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&t=6747
Below is a step-by-step video detailing how to make it -
The open community for geeks

I assembled the atrix doc to Pi but have 1 problem it doesn’t turn the Pi off when you close the lid.
Is there a mod to the doc that will do this?
Have you done this with the lapdock for the Atrix 2?
Have you done this with the Lapdock 100 model used for Atrix 2?
I did it for Atrix lapdoc sku:65242 ssn: AC03A78A2000000 .
Don’t know about the Atrix 2