Sadly when I travel I have to check my gear. Here in the US you can check almost anything including firearms (if you're a law-abiding citizen and willing to jump through the proper beaurocratic hoops). I too would LOVE to hear ideas about airline carry-on acceptable PSKs. I liked the previously mentioned laminate counter top knife idea. I tried it. Not exactly razor sharp but certainly a more effective cutting tool than my teeth.

BTW: A fancy metal ballpoint pen is as good a weapon as any knitting needle and a laptop computer is full of "dangerous weapons" once you smash it open. Don't tell the TSA that though or computers and writing utensils will be banned too. <img src="/images/graemlins/smile.gif" alt="" />