This account of a university professor's battle with cheating was an interesting read. He goes on to tell of how he used the university's anti-cheating measures, as well as his own tactics, but in the end received the opposite of what he was hoping for: poor professor-evaluations from students resulting in a lower raise in his salary.
If you're an educator, or have any interest in the school systems, you need to read this: Why I Will Never Pursue Cheating Again.
[update]It looks like this article was (temporarily) taken down. Hopefully it'll come back soon.[/update]