I had a discussion with one of our customers about an inexpensive setup for sign management using an All-In-One PC mounted to a wall in their employee information area and then running some type of automated image slide deck on the screen to provide information updates and calendar info for their employees.
I decided to do this using PowerPoint and setting it up to create a self executing file that once it is started will run continuously on the system. Here is a quick video clip on setting this up using PowerPoint 2010.