The few, the very, very few. There might be two or three of us. Here's mine: It started life as an Epiphone Pro IV, with active pickups. It was the result of a "losing" eBay bid. When it turned up, I played it for a while, but decided I didn't like the big frets, and if it was going to get a fret job, it might as well be fretless. So, the frets are gone, replaced by walnut veneers. Not too long after that, I decided I didn't like the active electronics much, so that all got ripped out, replaced by a passive circuit and Alumitone Bass Bars. They are an odd semi-piezo kind of pickup. It's currently strung with Black Beauties, but I think Cobalt Flats might suit it better. It was wired up like a stack-knob Jazz for a while, but that didn't work like I wanted it to. Now it's wired VVT with a switch. I don't like that all that much, either. So, maybe I'll go back to stack knob wiring, but with some kind of modification to make it work like it should. I don't know what that means yet. So, there's my fretless 'Bird. I know there's a few others out there. We might get to ten if we are lucky.