Instead, let the user guess if an entry is just an entry or opens another screen full of interesting things. If it's just an entry, then it will either have a

Instead, let the user guess if an entry is just an entry or opens another screen full of interesting things. If it's just an entry, then it will either have a checkbox or a text box whilst inactive list members which do nothing are grey instead of white (at least on Gingerbread, I don't have an ICS device to hand). So there's no ambiguity. You can argue that a caret or ellipsis might convey the affordance of expanding the item by selecting it and I wouldn't necessarily disagree, but the Android UI as designed is at least unambiguous.