Plus you can zoom with W and S. I asked Martin-o long ago about using the mouse wheel, but there were other priorities. Oh, and there´s a difficulty setting: you can choose in between "normal" and "ultra" enemies.
By the way, about hotkeys, we have m for free camera, p for pause, and also CTRL+ numbers to make groups of units (the units tend to keep on with the formation they were when the group was made).