"Yes Indeed" I'd love to see it! I'd also like to see a "Belt Buckle Knife".
Like your idea about the blade.
I feel a boot knife needs to be a fixed blade and not a folder I feel the same way about a neck rig! Why you ask??? Because when you pull it out of it's sheath it's ready to go! Couldn't be faster!
Also if it's designed right it could be more than a boot knife-check out the Bud Nealey Specialists made by Boker http://www.knifecenter.com/knifecenter/boker/
Very cool knife with many uses! You can ware it upside down on the outside of your boot covered by your pants! (way better than the conventional ones that need to be upright!)
Just lift your foot and extract the knife.
A knife with many uses to "BOOT".