public bool IsLocal ()
		{
			// webcal is cached locally, so it's ok.
			// contacts:/// is the URI for birthdays and
			// such out of the addressbook, so it's ok too.
			//
			// System.Uri really sucks; we can't use it 
			// because it throws an exception on URIs w/o
			// a hostname (like "contacts:///"), so we
			// have to deal with the strings directly.
			return Uri.StartsWith ("file://") || Uri.StartsWith ("webcal://") || Uri.StartsWith ("contacts://");
		}