I've been using cartridge razors for the last 20 years or so, but recently switched to DE. (Thanks to B&B for the reviews section - based on reviews I picked out some equipment with which I'm very pleased.)
Anyway, along the way I made a one-time foray into kitchen knives - or, specifically, a Sabatier paring knife. I like to cook and detest dull cooking knives, so I have gotten pretty adept at sharpening them myself. One day, to test my sharpening prowess, I sharpened my favorite 3" knife and used it to shave. It wasn't the best shave ever, and I wound up with plenty of "weepers," but it did work, and I didn't kill myself!
If anybody feels like replicating my effort, I would suggest using a knife with relatively soft steel - Wusthof, for example, or better yet something in old-fashioned (rust-prone) carbon steel. A hard steel knife (e.g., Henkels) holds its edge well but is harder to get razor-sharp.
Has anybody else tried shaving with odd cutting implements (knives, hatchets, chainsaws, whatever)?