If you want to look further into the Vectorial Elevation project by Rafael Lozano-Hemmer, that we covered in class, you can check out the current iteration of the project which is now in Vancouver.
Vancour Vectorial Elevation Home Page: http://www.vectorialvancouver.net/home.html
TO JUST WATCH: http://www.vectorialvancouver.net/live.html (NOTE: There is a count down to the next time the lights and the feed goes live.)
To Participate: http://www.vectorialvancouver.net/participate.html
Still my favorite. A video on the Mexico City Iteration (QuickTime):