I've heard about Bob Dozier's knives here and there for quite a while. However, I'd never actually taken the time to look at any of them. I was browsing his site last night and found the Arkansas Toothpick.
In my mind, this is pretty much the ideal "concealable" fixed blade for self-defense. I'd normally prefer a blade slightly longer than 3.5" but with that blade length, you have options for carry that might not work with a longer blade. It can be had in either single or double-edge and it looks like it'd be very comfortable in either sabre or reverse grip (or pikal with a DE version). A double-edged version is definately high on my wish list.
besides all that...it's purty