DNN Aliases
http://duhnetnuke3.net/DNN3PortalSetup/AddanHTTPAlias/tabid/110/Default.aspx
http://forums.asp.net/t/895935.aspx/2/10
http://forums.asp.net/t/895935.aspx/1
http://stackoverflow.com/questions/3829695/dotnetnuke-how-to-change-default-portal-alias-in-webinterface