The concept is simple. Take a Twitter account users latest tweet and post it to a clean Flash based web page. It's for use as a noticeboard for a hotel lobby. I imagine a unique URL will suffice for security, as the Twitter account will be the main way to manage the security of the Tweet post and who can access. Three basic color templates required and only one font style.
The 140 characters should fill the screen. The monitor used in the lobby will have it's browser set to full screen.