Currently, as far as I am aware, you need to use the CompizConfig Settings Manager application to play with the Unity configuration settings.
While this makes sense, from a technical point of view, it requires the user to know about the settings manager, install it, and then find the Unity options within it. Not very user friendly.
Is there a user friendly configuration application planned that will offer all the configuration options in an easy-to-use for new people fashion?
Obviously, application like this will be developed some day (unless Canonical dumps Unity).
For now, it's not coming. 11.04 is not helping with this at all. I couldn't find anything related to this from ubuntu Brainstorm. There doesn't seem to be any bugs filed, so most probably it will not be be fixed anytime soon.