I didn't think Grendel himself would show up here...
Somehow, I don't think that's his entire joystick collection. I could've sworn he mentioned something about owning a Logitech WingMan Interceptor and trying to develop a special adapter that would work with Logitech ADI (yet another digital gameport interface), but that was years ago, and I have yet to see any results. There's an open-source Linux driver for the ADI sticks floating around, so I'm pretty sure there's enough understood about the protocol to make a hardware USB adapter.
I've got two Interceptors lying around unused because of that one little problem. What a shame, since they're probably the best sticks Logitech ever made. All you could possibly want out of them would be USB and rudder twist. (The later WingMan Strike Force 3D would've been a decent follow-up if they didn't completely botch the pots/gimbals and the centering force, resulting in me using a MS SWFFB2 as my FFB stick of choice despite missing one badly-needed hat switch.)
As for other controllers...I spotted a Logitech CyberMan 2 amidst all those Microsoft sticks. I've wondered what it's like to play Descent with one of those. (However, I could've sworn that this was before Logitech bought up Labtec, and by proxy, Spacetec IMC. Back then, Spacetec favored the ball/sphere shape, but ever since they became the Logitech-owned 3Dconnexion, they've moved to the puck shape more reminiscent of the CyberMan 2.)