I have found what I believe might be the perfect PSK knife. It's the Gerber "Ridge Knife". Picture at: http://www.equipped.org/pp/pic852.htm

It's AUS-6 all "stainless" steel construction, black Teflon coated, one-hand opening, with a mid-frame blade lock mechanism. The aspect that wasn't mentioned in the 2002 Shot Show review of this knife (or at least the model that I found; the belt clip looks a little different than the pic) is that it's only 3 INCHES LONG closed with a 2 inch blade length. It weighs only 1.4 oz.

It is available in plain-edge blade, or 50% serrated. I chose the half serrated model (mistake?), for the extra cutting power. I believe that if the belt clip which is fastened with 2 tiny socket-head bolts is removed with a hex key, this knife would have one of the slimmest profiles available. The lanyard hole allows the belt clip to be removed without losing much functionality. For smaller size one could even file off the lanyard hole.
Run
ps- I found mine at Walmart for $17, and seems to be high quality <img src="images/graemlins/smile.gif" alt="" />