diff -r e4ee19d583bd -r c16fd81b520a Hardware/Hardware.cs
--- a/Hardware/Hardware.cs	Tue Aug 24 22:11:10 2010 +0000
+++ b/Hardware/Hardware.cs	Mon Sep 06 19:53:13 2010 +0000
@@ -48,6 +48,10 @@
       get { return new IHardware[0]; }
     }
 
+    public virtual IHardware Parent {
+      get { return null; }
+    }
+
     public ISensor[] Sensors {
       get { return active.ToArray(); }
     }