Scott Hanselman just posted this: http://www.hanselman.com/blog/FizzBinTheTechnicalSupportSecretHandshake.aspx
Tongue-in-cheek or otherwise, the idea makes me smile, and I can't help secretly hoping that it could work. Yeah sure, it's a secret, right! Just don't tell anyone who shouldn't know. And of course, all the support guys will instantly trust you as soon as you say it.