I have noticed that Notepad and Media Center gets the extended menu as well but unfortunately Office is left out. Maybe I'm just lazy but i really like the idea of customising the start menu with things that you want instead of the default options you get in all versions of windows.
Having said that i think that the new Jump list system is great , So much better than the eye candy preview window that was introduced in Vista. It wouldn't surprise me if someone was working on a project for the start menu already as the customisation community has so many talented people in its ranks, After all its still early days for windows 7.
Yes a shortcut of a shortcut , you could go on for ever making them.