The Hacme Bank example would be great to demonstrate the dangers of SQL injection; particularly given the high-profile events of last year. I've practiced on Hacme Bank, and it's a good learning tool. Don't understand why your professor would think that's too vague. If you have a fairly beefy laptop, you could install BackTrack in a virtual machine, along with a victim (could be Windows, Linux, etc), and demonstrate recon techniques (and how much info can be gathered using Nmap & Metasploit).


And I would be happy to join you on a conference call to help set destro23's professor straight. Wireless networks are everywhere, and too many of them are insecure.
