Removing iDisk from sidebar using local MCX?

I'm starting to get into managing preferences locally and have succesfully done some testing. But I cannot find where the option is to manage the appearance of iDisk or the system shortcut in the sidebar. All I see in com.apple.sidebarlists.manifest are Show Ejectables, Show Hard Disks, Show Removeable Media & Show Servers. Any ideas how those would be managed?