Try asking on the Chronicle of Higher Education:
http://chronicle.com/forums/index.php?board=25.0
I think prevention is the way to go:
My Prof friend just posted:
"I made the students put their blue books on the front desk. I passed them out randomly. This is designed to keep students from writing info inside the blue book. One student asked for another: his blue book was chock full of info that would have helped someone on the final.
The students who need to cheat for the test will usually not end up doing well.