Mind Index is probably the most practical and comprehensive eBook on billets (short of SwitchCraft) that I have ever read. I have no other words to say other then pick this up if you don't already have it.
While this is not a single effect that encompasses all senses as I had originally thought, this is still a worthy collection of useful effects. Some of the principles include things that I've known about, but never seen applied to mentalism before. I'm quite sure that I will be incorporating at least some of these into an act soon.
My Titanic deck has served me well. They can look for marks forever, you can shuffle the deck; they will never discover the secret. Effects are a little more limited than with a normal marked deck, and they can't choose a card as freely, but its well worth it.