From Ergotron http://www.ergotron.com/ this is a nice solution for the pano computer in a hallway
Vertical Lifts • Overview
The Vertical Lift (VL Series) is a low-profile, wall-mounted module that allows quick positioning of a monitor and keyboard. It’s perfect for areas where multiple operators use a single computer workstation.
- Low profile: In storage position, system depth as little as 4″
- Height adjustment of 9″; keyboard and LCD move in tandem
- Two versions: Standard Keyboard Tray model or Slide-Out Keyboard Tray model
- VESA FDMI compliant for easy monitor attachment
- 5-year warranty