It all started at Russell Beattie's website where he demonstrated a cool little flash application which showed the New York Traffic Cameras. It lead to Christopher Schmidt building his own little app in Nokia's Series 60 Python. And from there people starting hacking his script to represent their own cities. I added Houston and the script can be downloaded from here. Chris has updated his script to incorporate all the cities, and can be found here

UPDATE: since f2o.org is down at the moment I have also uploaded the script at this location http://www2.cs.uh.edu/~kkhan/houston_traffic.txt