I use graphics software like GIMP, Inkscape & Blender extensively for my business. But most of them require the use of the Alt key in some way or the other. Come Ubuntu 11.10, I haven't been able to find any way to change the shortcut for window moving/resizing from Alt+LMB/MMB to Super/Meta+LLM/MMB. This option was present in the 'Windows' settings in Gnome2, but it is not present anywhere in Gnome3. And yes, I have tried searching through the Shortcuts tab in Keyboard settings, its not there.