I am a registered user of an IPB board and there users get notified when a moderator deletes, approves or moves their threads and posts. I tried the demo of XenForo and it doesn't look like xenForo can do this? At least I didn't find any option to enable such notifications.
Edit: To not open a new thread, can anyone tell me if XenForo has a user browsing thread/forum box? All XenForo boards I saw didn't have it.
I would suspect this to be in the next version of XenForo, but if not... I know another developer other than myself, who has been playing with such an idea. So either way, I wouldn't expect a long wait on this