Is there anyway to change the Command-Tab function to a different command, or at least turn the dang thing off? I use a lot of keyboard shortcuts in classic that interfere with this. Like in Quark, you use Command-Tab to switch between tools in the tool palette. In Mac OS 9, you can change or turn off the App switch key command, but I don't see how to do this in X. Argh! Very annoying having to move the mouse back and forth between my work and the tool palette.

surely there is, get the excellent app called keyboard maestro. it features a builtin app switcher, reminiscent of OS9's GoMac, which i remapped to option-tab to not conflict with the built-in app switcher; but more importantly for you it allows you to remap key combos both system wide and for individual apps

All Keyboard Maestro seems to do is add Option-Tab rather than delete Command-Tab and then add Option-Tab.