Currently in 11.10 (and also 12.04), slamming your mouse pointer in the top left corner of the screen does nothing. Worse, even clicking there is a dead zone; I would expect to have at least the dash open when clicking there. Not sure if this is a bug or not.
Ideally I would like to have the Gnome 3 behavior, which shows all open applications when you move the mouse pointer to the top-left corner.
I know I can do something with Compiz Settings; I can configure a script to run, however I don't know how I can make a script go ' Super + W '? Is that possible?
I hope there will be a full and unified settings panel again when 12.04 goes live; it's a bit strange to not only use a whole separate settings panel for some things, but even one that's not installed by default! And 'corner hot spots' should definitely be a function in there, to assign common actions and keystrokes to that.