As covered in http://www.uvm.edu/~jgm/wordpress/?p=85 there appears to be an issue where by in order for users to create a site that activates the RAD Editor for Lists, the user needs to be granted Read/Write access to the following files:
C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\CONTROLTEMPLATES\RadEditorList.ascx
and
C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\CONTROLTEMPLATES\RadEditorList.ascx
and
C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\FEATURES\RadEditorFeature\RadEditorList.ascx
This is far from ideal from a security point of view...
Are there plans to address this in either the Lite or Full SharePoint RAD Editors?