Also it might be good to add in shortcuts for mirror, scale, rotate, and move and have them listed with the pop out description when you hover over the button on the left side bar. i'd suggest simply M, S, R, G (for grab) respectively for them.
also, not a shortcut, but a needed feature: While i love the faced box in the upper right corner for changing views, maybe letting us click on a face and drag the face to slightly change the view position could be implemented?