Tiffany Kimmel and Taimi Arvidson at the University of Oregon have produced a first class exploration of the city's secret list program. We first started examining possible constitutional issues in the Mercury last year. Here's the documentary:
There's also a feature article on the program at the university's website. I prefer the video, personally: It's perfect if you want to catch up on the controversies of this program in just ten minutes. Enjoy.