Jeff,
All of the Disney parks use the same system used described.
I say put the one sign by Coasters cause that is in the middle of the park. Another sign by town hall and one at the front of the park.
All the park would have to do is about every 20 mins or so have someone from each of the major rides call in and say how long the line is. A person could enter how long the line is into a computer and the computer would send the data to the different signs. Depending on how fancy the rides computer is(some rides computer can count how many people are in line) the ride computer itself could be hook right up to the computer that sends the data to the signs.
-------------
Andrew
http://www.experiencethepoint.com
*** This post was edited by Andrew on 4/17/2001. ***