Try the LocatePC system to track stolen computers. How does it compare to Adeona?
Use iptables to confuse port scans
Get Damn Vulnerable Linux 1.5 and find out what it can do
Set up the Wall of Sheep in the S214 lab
Explore Bluetooth wardriving and Bluesnarfing (you will need some special hardware)
Set up and test Cisco Torch - Mass Cisco Vulnerability Scanner
Make a webcam security system for S214
Make something like Tweet-a-watt
Use Gmer to detect the Hacker Defender rootkit
Try out Secunia Personal Software Inspector
Try out File Shredder
Set up TrueCrypt drive encryption and demonstrate it
Get BIOS and/or BitLocker passwords from RAM location 041e with a hex ram viewer
Test DeCrapifier - one guy said it ruined his MS Office
Test more rootkits, there are a ton here: http://www.rootkit.com/index.php
Hack into a fingerprint reader (I have one you can use)
Install Tripwire and detect an intrusion (http://www.techradar.com/news/computing/how-to-catch-linux-system-intruders-467913)
Download the Perspectives Anti-MITM Firefox Extension and see how it works, try a MITM attack with it on.
Download the Free 'Trojan-Proof' Password Tool and test it out.
Try the XArp ARP spoofing detection tool and test it at detecting a real ARP attack, such as with Cain
Python 3.0 is out. It has a lot of changes. Try it out--write some simple code and show it to the class.
Test ReadNotify--a service that tracks emails you send. Can you prevent it from working with firewalls, or Noscript, or by reading your email in text-only?
Try some of these awesome router hacks-- you should be able to turn off router security, change the administrator password, etc.
Make a Bootable USB Flash Thumb Drive to Install Vista with.