I must agree with what Michel said..
And I will also say that the main menu is a nightmare for most users, if we look at D6 and we now look on D7 you can see what I mean.. The navigation is not fluid anymore, everything is stacked to the max..
Try to use the D7 beta2 with a 1024x768 resolution.. you can't.. we should remember that this resolution is still used by a vast ammount of people..
A first step will be to make the main menu smaller in height and scrollable just as windows start > all see more programs work when the menu is not fitting the screen area.. and also we need some more clear names in the menus..