Windows + M minimizes all open windows as well.
I posted this in another thread, but if you click a link with the middle mouse button, it'll open in a new tab in Firefox and IE 7.
If you click the New Posts button on CF, normally you have to wait 15 seconds before using it again. If you open it in a new tab or window though, the limit is removed.
And I think for the toolbar, it just has to be along the edge of the screen. Anywhere else and it'll just make a shortcut to My Computer.