You've given us a way to set up default configurations for different  user groups in DNN 2.1.2 by changing the web.config thusly:
    Admin_AutoConfigure = "Full"
    Admin_SecurityPolicyFile = "admin.config"
    Admin_DisableItemList = ""
    Admin_AllowPasteHtml = "true"
    Admin_EditorOnPaste  = "default"
    Admin_ReadOnly = "false"
    Admin_ShowBottomBar ="true"
    Admin_ShowHtmlMode = "false"
    Admin_ShowPreviewMode = "true"   
    Registered_AutoConfigure = "Full"
    Registered_SecurityPolicyFile = "admin.config"
    Registered_DisableItemList = ""
    Registered_AllowPasteHtml = "true"
    Registered_EditorOnPaste  = "default"
    Registered_ReadOnly = "false"
    Registered_ShowBottomBar ="true"
    Registered_ShowHtmlMode = "false"
    Registered_ShowPreviewMode = "true"                               
    Guest_AutoConfigure = "Full"
    Guest_SecurityPolicyFile = "admin.config"
    Guest_DisableItemList = ""
    Guest_AllowPasteHtml = "true"
    Guest_EditorOnPaste  = "default"
    Guest_ReadOnly = "false"
    Guest_ShowBottomBar ="true"
    Guest_ShowHtmlMode = "true"
    Guest_ShowPreviewMode = "true"

Great idea!

1. The admin secton really only applies to the HOST, or Super User. This may be by design, but is not intuitive. Seems like it should apply to all admins for the portal.
2. When I change the Registered Autoconfigure = "Full", this does not seem to work. It still only shows the Simple configuration for any registered users.
3. Same issue with the Guest configuration. In order for registered users to see a full menu, I have to change the Guest Configuration to show a Full menu (Guest_AutoConfigure = "Full").

Also- do you have a place online that give some hints how to edit the sourcecode to customize the install so that different roles will see different toolbars and admin configurations?