I have a confession to make. I'm lusting after one of these:
http://www.swisstool.co.uk/st/product.ph...CFQGZ2AodRk2FbgNow that's a tool
On a more serious note, considering the SAK as a survival tool, John's observations about K.I.S.S. are probably about right.
I, personally, E.D.C. a SwissChamp and a Farmer. If I'm dropped in the pot with just them and the lighter that I always carry, I'm quite certain that I can survive. Certainly short term.