Here's what A GUY I KNOW carried.
On various flights:
A teenth in his sock.
Golfball sized wrap of weed in the hold.
Lump of hash in condom pocket of jeans.
1L Volvic mineral water.
Moody looking electric soldering iron, complete with tip. Actually, they found that one, but The List only mentioned the tiny pair of needlenose pliers as they, unlike a soldering iron, are a "Tradesman's Tool".
He's gonna give them a whole HDD (minus heads+platters, plus... You guessed it!) in a removable dock with covering letters and other decoy props this summer. I'm thinking of setting up a "security" staff temping agency. Rentatard, or something like that.
The one with the http://www.straightdope.com/columns/read/1202/is-it-possible-to-make-an-undetectable-nonmetal-gun