I’ve written (incomplete) simple plugin for Evolution which provides a combo box + menu for switching folders. Now you can hide the sidebar. This really helps in freeing up some space in your screen and can have good vertical view layout. This would help computers with smaller screen size.
To try out this plugin / For more information : http://www.johnnyjacob.org/makespace.html .
One other feature that I would like to have is simple folder bookmarks. Bookmarked folders would appear in the top of the menu (You don’t have to navigate all the way down in the menus)
Let me know what you think and if you would like to have any features put it down in the comments. 🙂