Toss it in with your electronics if you have any. I keep my camera wires in a bundle with a few odds and ends including a few writing instruments, styli, batteries, and the like. My card tool and pocket knife aren't even noticed.

Victorinox/Swiss Army has a great wallet multi-tool called the SwissCard. Although mine was a gift, I've used it hundreds of times & would definately get another if I lost it. I've never had any travel problems with it even after the heightened security measures. I usually toss it in with my electronics when going through any scanners, I'm sure that helps.
Here's a direct link, although you can buy it elsewhere:
http://www.swissarmy.com/MultiTools/Pages/Product...