>I am going to develop an app at work to allow people to see our sign-in board. I am going to point a webcam at the board, the take snapshots every 1 or so minutes then have a 486 running a VFP app, copy them up to a fileserver. People will point their browser to a webpage which refreshes each minute to see the board. The sign-in board is white with black letter (good contrast). It is about 2 metres wide and 1 metre tall. Printing is about 3.5 centimetres high.

Why wouldn't you just access that content and broadcast it in a standard HTML page? The sign-in board must read its content from somewhere, thus an HTML page can do the same.