Coming sometime early this year, they’ll be available in 3UP and 4UP versions. You can pick your own joystick ball colors too. The standard models will ship in black walnut wood, but they’re happy to take custom orders for other materials too.
Me, I want one that looks like the front of an old Missile Command cabinet, complete with cigarette burns. It’s too bad you can’t hang a coat on a trackball. Pricing hasn’t been announced yet, but if you’d like to inquire about ordering one you can contact Surface Tension here.