A show on ITV ('The Chart Show' I think it was called) used Amigas for the video overlay information. There was a WB1.3-style pointer clicking on things on screen and they popped up. In the years before it was axed, the information overlay was changed to something a bit more modern - which I assume meant the Amiga they had controlling it was either retired or broke.
Northampton bus station information displays had a Guru Meditation showing when I was there once, so they were all controlled by Amigas.
There's a "famous Amiga uses" document/web site which lists a lot of these.
